Year 13 Edexcel Economics: Preparing for International Economics Competitions

📚 Year 13 Edexcel Economics: Preparing for International Economics Competitions | 国际竞赛备战攻略

International economics competitions such as the International Economics Olympiad (IEO), essay contests like the Marshall Society or RES Young Economist of the Year, and university-led challenges offer an outstanding opportunity for Year 13 students to stretch their understanding of Edexcel Economics beyond the A‑Level syllabus. These competitions not only test theoretical knowledge of micro and macro concepts, but also demand rigorous analysis of real‑world data, policy evaluation and creative problem‑solving. For Edexcel learners, the course structure — with its emphasis on applying models to contemporary contexts — provides a strong foundation. However, success requires a targeted preparation strategy that bridges the gap between exam‑style answers and the higher‑order demands of competitive economics.

国际经济学奥林匹克（IEO）、马歇尔学会论文比赛、皇家经济学会年度青年经济学家等国际竞赛，为 Year 13 学生提供了将 Edexcel 经济学知识延伸到 A‑Level 考纲之外的绝佳机会。这些竞赛不仅考察微观与宏观理论，更要求对现实数据进行严格分析、评估政策并创造性地解决问题。Edexcel 课程本身强调将模型应用于当代情境，为参赛打下了扎实基础。但要取得好成绩，还需要一套有针对性的备考策略，以跨越考试风格答案与竞赛高阶要求之间的鸿沟。

1. Understanding the Landscape of International Economics Competitions | 了解国际经济学竞赛的版图

The first step is to map out the types of competitions available. The IEO, for instance, comprises three parts: a multiple‑choice and open‑response Economics test, a Financial Literacy game and a Business Case presentation. Essay competitions like the Marshall Society focus on a single question requiring extended arguments, while events such as the National Economics Challenge (US) blend quick‑fire quizzes with critical thinking rounds. Each format emphasises different skills, so you must align your preparation with the specific assessment criteria. Year 13 Edexcel students are well‑positioned because the syllabus covers market structures, macroeconomic policy, trade and development — topics that frequently appear in competition papers.

第一步是摸清竞赛的种类。例如，IEO 包括经济学选择题与开放式问答题、金融素养游戏和商业案例展示三个部分。马歇尔学会等论文比赛聚焦一道需要展开论证的题目，而美国全美经济学挑战赛（NEC）则融合了快速问答与批判性思维环节。每种形式侧重的技能不同，因此你必须根据具体评分标准调整备考方向。Year 13 Edexcel 的学生具备优势，因为课程涵盖了市场结构、宏观经济政策、贸易与发展等常在竞赛中出现的话题。

Beyond content overlap, note that competition questions often go beyond the Edexcel specification, introducing concepts such as the Shapiro‑Stiglitz efficiency wage model, Harrod‑Domar growth theory or second‑degree price discrimination with explicit profit calculations. You do not need to master an entire undergraduate textbook, but you should be comfortable extending A‑Level models and reading supplementary materials. Start by downloading past papers or sample tasks from competition websites, so you can identify recurring themes and the depth of analysis expected.

除了内容重叠之外，要注意竞赛题目常常超出 Edexcel 考纲，引入夏皮罗‑斯蒂格利茨效率工资模型、哈罗德‑多马增长理论或需要精确利润计算的二级价格歧视等概念。你不需要啃完整本本科教材，但应当能自如地扩展 A‑Level 模型，并阅读补充材料。先从竞赛官网下载历年真题或样题，找出反复出现的主题和分析深度要求。

2. Building a Strong Microeconomic Toolkit | 构建扎实的微观经济学工具箱

Microeconomics forms the analytical backbone of almost every competition. Edexcel’s Themes 1 and 3 cover introductory and advanced micro, including consumer and producer surplus, externalities, game theory and labour markets. In competitions, you will be expected to move seamlessly between diagrammatic analysis and quantitative reasoning. Practise drawing cost and revenue curves for a monopolist, then calculating deadweight loss under a linear demand function like P = a − bQ. Competitions frequently ask for elasticity calculations, cross‑price effects and the impact of a specific tax on consumer and producer surplus — skills that go beyond the structured Edexcel questions.

微观经济学几乎是所有竞赛的分析基础。Edexcel 的主题 1 和主题 3 涵盖了基础与进阶微观内容，包括消费者与生产者剩余、外部性、博弈论和劳动力市场。在竞赛中，你需要能够在图形分析与定量推理之间自如切换。练习画出垄断企业的成本与收益曲线，然后在 P = a − bQ 这样的线性需求函数下计算无谓损失。竞赛经常要求计算弹性、交叉价格效应以及从量税对消费者和生产者剩余的影响——这些技能超出了 Edexcel 结构化题目的要求。

Game theory is another high‑yield area. Edexcel introduces the prisoners’ dilemma, but competitions expect you to construct payoff matrices, identify dominant strategies, find Nash equilibria in pure and mixed strategies, and apply subgame perfection to sequential games. Use a whiteboard to sketch decision trees for entry deterrence or collusion scenarios, then solve by backward induction. Linking game‑theoretic predictions to real‑world industries — such as the repeated interaction between Coca‑Cola and Pepsi or pricing strategies of streaming platforms — demonstrates the applied understanding that judges value.

博弈论是另一个高回报领域。Edexcel 介绍了囚徒困境，但竞赛期望你构建收益矩阵，识别占优策略，找出纯策略与混合策略的纳什均衡，并将子博弈精炼应用于序贯博弈。用白板画出进入阻挠或合谋情境的决策树，然后通过逆向归纳求解。将博弈论预测与现实行业联系起来——如可口可乐与百事可乐的重复互动，或流媒体平台的定价策略——可以展示评委看重的应用理解力。

3. Mastering Macroeconomic Policy Debates | 掌握宏观经济政策辩论

Macroeconomics in competitions moves quickly from basic AD/AS analysis to nuanced policy discussions. Edexcel Theme 2 (UK macro) and Theme 4 (global macro) give you the Phillips curve, fiscal vs monetary policy, and exchange rate systems. Competition questions will often present a hypothetical economy and ask you to diagnose the type of inflation or output gap, then propose a coordinated mix of monetary, fiscal and supply‑side policies. You must be able to weigh trade‑offs explicitly — for example, explaining how a depreciation of the currency might boost net exports in the short run while importing inflation and reducing real incomes.

竞赛中的宏观经济学很快从基础 AD/AS 分析转向微妙的政策讨论。Edexcel 主题 2（英国宏观经济）和主题 4（全球宏观经济）提供了菲利普斯曲线、财政与货币政策对比以及汇率制度等知识。竞赛题目通常会给出一个假想经济体，要求你诊断通胀类型或产出缺口，然后提出货币、财政与供给侧政策的协调组合。你必须能够明确权衡利弊——比如解释货币贬值短期内可能促进净出口，但同时会输入通胀并降低实际收入。

Financial markets and the role of expectations are increasingly prominent. Edexcel introduces quantitative easing and the Fisher equation, but competitions may require you to discuss forward guidance, the zero lower bound and the credibility of central banks. Reading the Bank of England’s Monetary Policy Report or the Federal Reserve’s Beige Book for one quarter before the competition helps you incorporate real data into your answers. When you write, always articulate the transmission mechanism step by step: a change in the policy rate affects market rates, which influences borrowing costs, investment, aggregate demand and finally price levels.

金融市场和预期的作用日益突出。Edexcel 介绍了量化宽松和费雪方程式，但竞赛可能要求你讨论前瞻性指引、零利率下限以及央行的可信度。赛前阅读一个季度的英格兰银行货币政策报告或美联储褐皮书，有助于你将真实数据融入答案。写作时，务必逐步阐述传导机制：政策利率变化影响市场利率，进而影响借贷成本、投资、总需求，最终影响价格水平。

4. Excelling in International Economics and Trade | 在国际经济学与贸易中脱颖而出

International economics is a pillar of Edexcel Theme 4 and a favourite topic for competition setters. You need to be confident with comparative advantage (including the Ricardian and Heckscher‑Ohlin models beyond the simple two‑goods case), terms of trade calculations, and the welfare effects of tariffs, quotas and subsidies. Competitions often set numerical problems where you must calculate the change in consumer surplus, producer surplus and government revenue after a tariff is imposed on a small country. Knowing the assumptions — such as perfectly elastic world supply or no retaliation — allows you to critique the model’s limitations.

国际经济学是 Edexcel 主题 4 的支柱，也是竞赛出题人的最爱。你需要熟练掌握比较优势（包括超出简单两商品情形的李嘉图与赫克歇尔‑俄林模型）、贸易条件计算以及关税、配额和补贴的福利效应。竞赛常设数字题，要求你计算小国征收关税后消费者剩余、生产者剩余和政府收入的变化。了解模型假设——如世界供给完全弹性或无报复行为——能让你批判模型的局限性。

Exchange rate determination is another deep well. Edexcel covers floating, fixed and managed floats, but competition problems may ask you to use the Marshall‑Lerner condition and the J‑curve effect to explain why a depreciation initially worsens the trade balance before improving it. You might also be asked to evaluate the effectiveness of devaluation under different elasticities of demand for exports and imports. Prepare short “evaluation paragraphs” for common claims: “A weak pound always helps UK exporters” — then unpick the conditions under which it might not, such as high import content of exports or invoicing in foreign currency.

汇率决定是另一口深井。Edexcel 涉及浮动、固定和有管理的浮动汇率，但竞赛题可能要求你运用马歇尔‑勒纳条件和 J 曲线效应，解释为何贬值最初会使贸易收支恶化然后才改善。你还可能被要求评估在不同进出口需求弹性下贬值的有效性。针对常见论断准备简短的“评估段”：“弱势英镑总有利于英国出口商”——然后剖析其可能不成立的条件，例如出口品进口含量高或以外币计价结算。

5. Data Response and Quantitative Analysis Skills | 数据回应与定量分析技能

Many competitions, especially the IEO and NEC, include a substantial data interpretation component. You may be given tables of GDP growth, unemployment rates, CPI inflation and current account balances for several countries, and asked to identify the country most likely in a liquidity trap or experiencing cost‑push inflation. Edexcel students regularly handle data in the Paper 3 synoptic section, but competition data sets are denser and require faster numerical reasoning. Practise scanning tables for anomalies — a country with rising GDP but falling employment might be experiencing productivity gains rather than demand‑side weakness.

许多竞赛，特别是 IEO 和 NEC，包含大量数据解读的环节。你可能拿到多个国家的 GDP 增长、失业率、CPI 通胀和经常账户余额表格，并被要求找出最可能陷入流动性陷阱或经历成本推动型通胀的国家。Edexcel 学生在 Paper 3 的综合题中经常处理数据，但竞赛数据集更密集，要求更快的数字推理。练习快速扫描表格寻找异常——一个 GDP 增长但就业下降的国家可能正在经历生产率提升，而非需求侧疲弱。

Develop the habit of performing back‑of‑the‑envelope calculations. For instance, the expenditure multiplier formula k = 1 / (1 − MPC) or 1 / (MPS + MPT + MPM) appears regularly. You may need to compute the final change in national income given an injection, or compare multiplier magnitudes between an open and closed economy. Keep a sheet of key formulas: cross‑price elasticity, PED using the midpoint method, real exchange rate, real interest rate (Fisher equation) and growth accounting. Being able to apply these without hesitation saves precious time during timed rounds.

养成随手估算的习惯。例如，支出乘数公式 k = 1 / (1 − MPC) 或 1 / (MPS + MPT + MPM) 经常出现。你可能需要根据一笔注入计算国民收入的最终变动，或比较开放与封闭经济中的乘数大小。准备一张关键公式清单：交叉价格弹性、用中点法计算的 PED、实际汇率、实际利率（费雪方程式）和增长核算。能毫不犹豫地应用这些公式，可在限时环节节省宝贵时间。

6. Essay Writing for Economics Competitions | 经济学竞赛的论文写作技巧

Essay competitions such as the Marshall Society or the RES Young Economist of the Year demand a different writing style from Edexcel 25‑mark essays. Instead of following a rigid KAA‑evaluation structure, you need to craft a coherent and original argument that engages with academic literature and real‑world evidence. The essay must have a clear thesis statement, a logical progression of paragraphs, and a nuanced conclusion. Citations are often required, so learn to reference sources in a consistent format (e.g. Harvard style). Edexcel students can leverage the extended analysis they practise in Theme 3 and Theme 4 essays, but must add independent research.

马歇尔学会或 RES 年度青年经济学家等论文比赛，要求的写作风格不同于 Edexcel 的 25 分论述题。你不能再套用僵化的 KAA‑评估结构，而需要构建一个连贯、新颖的论点，并引用学术文献与现实证据。文章必须有明确的中心论点、逻辑递进的段落以及细致入微的结论。经常要求提供参考文献，因此要学会用一致格式（如哈佛体）引注来源。Edexcel 学生可以利用他们在主题 3 和主题 4 论述题中练习的拓展分析，但必须补充独立研究。

Start by deconstructing the essay prompt. If the question is “Should central banks target nominal GDP instead of inflation?“, identify the key economic trade‑offs: the advantages of NGDP targeting in stabilising both output and prices versus the communication challenges and measurement lags. Use diagrams — a modified AD‑AS model showing how NGDP targeting could anchor expectations — but also discuss the historical experiences of countries like the United States under Paul Volcker or Japan’s deflationary struggles. When evaluating, avoid simple “it depends” statements; instead, state the conditions under which each policy is superior, drawing on empirical studies.

从拆解题设开始。如果问题是“央行是否应盯住名义 GDP 而非通胀？”，先识别关键经济权衡：名义 GDP 盯住在同时稳定产出与物价方面的优势，与其沟通挑战和测量时滞。使用图表——一个展示名义 GDP 盯住如何锚定预期的修正 AD‑AS 模型——但也讨论保罗·沃尔克治下的美国或日本通缩挣扎等历史经历。评估时，避免简单的“视情况而定”表述；相反，援引实证研究，说明每种政策占优的条件。

7. Time Management and Mock Practice | 时间管理与模拟演练

Competition preparation is as much about efficiency as it is about knowledge depth. For exam‑style competitions, simulate timed conditions weekly. Set a stopwatch and attempt a past multiple‑choice section or a full data‑response question without notes. Edexcel students are familiar with time‑pressured exams, but competition papers can feel faster because the questions are less predictable. After each mock, do a thorough error analysis: classify mistakes as content gaps, misreading the question, or calculation errors. This targeted feedback loop ensures you improve faster than by simply reading textbooks.

竞赛备考既关乎知识深度，也关乎效率。对于考试型竞赛，每周进行限时模拟。设置秒表，尝试在无笔记条件下完成一套往届选择题或完整的数据回应题。Edexcel 学生习惯限时考试，但竞赛试卷可能感觉更快，因为题目更不可预测。每次模拟后，进行彻底的错误分析：将错误归类为知识空白、误读题目或计算失误。这个有针对性的反馈循环能确保你比单纯阅读教材进步更快。

For essay competitions, create a timeline that starts 6‑8 weeks before the deadline. Week 1‑2: choose a topic and read 3‑5 seminal papers or books. Week 3: outline the argument and collect data (World Bank, IMF, FRED). Week 4: write a rough first draft, focusing on flow rather than polish. Week 5‑6: revise, sharpen the thesis, add counterarguments and refine diagrams. Week 7: proofread and check citations. At each stage, seek feedback from a teacher or a knowledgeable peer. Edexcel’s emphasis on evaluation can be turned into a strength if you explicitly discuss caveats and alternative viewpoints.

对于论文比赛，制定一个截至日期前 6‑8 周启动的时间表。第 1‑2 周：选择题目，阅读 3‑5 篇重要论文或著作。第 3 周：拟定论证框架，收集数据（世界银行、IMF、FRED）。第 4 周：撰写粗略初稿，重点关注流畅性而非修饰。第 5‑6 周：修改、打磨论点、加入反论并优化图表。第 7 周：校对并检查参考文献。在每个阶段，寻求老师或内行同伴的反馈。Edexcel 对评估的重视可以转化为优势，只要你明确讨论限定条件和替代观点。

8. Leveraging Edexcel Themes for Open‑Ended Business Cases | 利用 Edexcel 主题应对开放式商业案例

The business case component of the IEO or similar team competitions requires you to apply economic reasoning to a realistic scenario — perhaps advising a government on privatising a state‑owned railway or a tech firm on its pricing strategy in a two‑sided market. Here, Edexcel’s synoptic approach in Paper 3 is golden. You can draw on micro concepts (market failure, price discrimination), macro indicators (business cycle, exchange rates) and global trade arguments to build a holistic recommendation. The key is to structure your presentation clearly: start with a problem diagnosis, use economic models to evaluate options, and conclude with an implementable strategy that acknowledges risks.

IEO 或类似团队竞赛中的商业案例环节，要求你将经济学推理应用于现实场景——或许是为政府提供关于铁路私有化的建议，或为一家科技公司就双边市场定价策略提供咨询。这里，Edexcel 在 Paper 3 中的综合分析方法是金钥匙。你可以利用微观概念（市场失灵、价格歧视）、宏观指标（商业周期、汇率）和全球贸易论点来构建全面的建议。关键在于清晰架构展示：从问题诊断入手，运用经济学模型评估选项，最后提出一个承认风险且可实施的策略。

Practice by taking corporate case studies from The Economist or Financial Times and asking: what is the economic rationale for this strategy? For instance, when Disney launched Disney+, explain how the move from licensing content to a direct‑to‑consumer model changes the firm’s monopoly power and ability to price‑discriminate. Write a two‑page briefing note that a team could use to build a presentation. This not only prepares you for business cases but also enriches your Edexcel essays with contemporary examples that examiners appreciate.

练习时，从《经济学人》或《金融时报》中选取企业案例，并问自己：这一策略的经济逻辑是什么？例如，当迪士尼推出 Disney+ 时，解释从内容授权转向直接面向消费者的模式如何改变了公司的垄断势力与价格歧视能力。撰写一份两页的简报，团队可据此准备演示。这不仅为商业案例做好准备，还能用考官欣赏的当代案例充实你的 Edexcel 论文。

9. Building a Wider Reading Habit | 培养广泛阅读的习惯

Edexcel provides a structured narrative, but competitions thrive on contextual awareness. Regularly read columns by economists like Martin Wolf, Tim Harford or John Kay. Follow policy announcements from the Bank of England, ECB and Federal Reserve. When you read, ask yourself the Edexcel “evaluate” question: what are the intended and unintended consequences? Could the policy be ineffective due to time lags or behavioural responses? Maintaining a digital scrapbook of news clips, data charts and short reflections will ensure you never run out of evidence during an essay or presentation.

Edexcel 提供了结构化的叙述，但竞赛更看重情境意识。定期阅读马丁·沃尔夫、蒂姆·哈福德或约翰·凯等经济学家的专栏。关注英格兰银行、欧洲央行和美联储的政策公告。阅读时，问自己 Edexcel 的“评估”问题：预期效应与意外后果是什么？该政策是否可能因时滞或行为反应而失效？维护一个包含新闻剪报、数据图表和简短反思的数字剪贴本，可确保你在论文或演讲中从不缺乏论据。

A focused reading approach works best. For each Edexcel topic — say, “monopsony power in the labour market” — find one academic article (e.g. on the effects of minimum wage in a monopsony) and one policy report. Summarise the key findings in 150 words, noting how they extend the standard textbook model. This exercise directly mirrors the synthesis required in top‑band competition answers and helps you internalise the language of professional economists.

聚焦式阅读效果最好。针对每个 Edexcel 主题——比如“劳动力市场的买方垄断势力”——找一篇学术文章（如关于买方垄断下最低工资的影响）和一份政策报告。用 150 字总结关键发现，并指出它们如何扩展了标准教科书模型。这一练习直接反映了竞赛高分答案所需的综合能力，并帮助你内化专业经济学家的语言。

10. Collaboration and Peer Learning | 协作与同伴学习

While individual study is important, many competitions have team components. Forming a study group with fellow Year 13 economists can accelerate your learning. Assign each member a topic to teach — one explains the Laffer curve, another covers the Kaldor‑Hicks efficiency criterion, a third presents on exchange rate overshooting. Teaching forces you to clarify your own understanding and exposes gaps. Additionally, running mock business case presentations with a team develops the soft skills of communication, delegation and handling Q&A under pressure, which are essential for the IEO or similar events.

个人学习固然重要，但许多竞赛设有团队环节。与 Year 13 同伴组建经济学学习小组可以加速进步。给每个成员分配一个教学主题——一人讲解拉弗曲线，另一人介绍卡尔多‑希克斯效率标准，第三人阐述汇率超调。教给别人迫使你理清自己的理解，并暴露知识漏洞。此外，与团队进行模拟商业案例展示可以培养沟通、分工和在压力下处理问答的软技能，这对 IEO 等赛事至关重要。

An effective technique is to use the “Harkness method” for discussion. Pick a provocative statement — “Economics is too focused on GDP growth and ignores well‑being” — and debate it using only economic reasoning and data. Edexcel students will recognise this as an extension of evaluative comments, but doing it live trains you to think on your feet. Recording these sessions and reviewing your argumentation afterwards reveals habits such as over‑reliance on a single perspective or insufficient use of quantitative evidence.

一个有效的技巧是用“哈克尼斯教学法”进行讨论。选一个挑衅性命题——“经济学过于关注 GDP 增长而忽视了福祉”——并仅用经济学推理和数据展开辩论。Edexcel 学生会意识到这是评估性评论的延伸，但实时进行能训练你临场思考。录下这些环节，事后回顾你的论证过程，可以揭示出过度依赖单一视角或量化证据使用不足等习惯。

11. Managing Stress and Building Confidence | 管理压力与建立自信

Competing at a high level can be stressful, but a positive mindset is a performance multiplier. Recognise that competitions are a learning journey, not a pass‑fail test. Use the Edexcel revision techniques you already know — spaced repetition, active recall and interleaving — to solidify knowledge. Schedule short mindfulness or physical activity breaks during study blocks to maintain cognitive stamina. Before a competition day, visualise yourself calmly reading the questions, sketching diagrams and crafting a well‑structured response. This mental rehearsal reduces anxiety and improves focus.

高水平竞赛可能带来压力，但积极心态是表现的倍增器。要认识到竞赛是一段学习旅程，而非通过性考试。运用你已掌握的 Edexcel 复习技巧——间隔重复、主动回忆和交叉练习——来巩固知识。在学习板块之间安排简短的正念或体育活动休息，以维持认知耐力。赛前，想象自己平静地阅读题目、绘制图表并构建条理清晰的答案。这种心理预演能减轻焦虑，提升专注力。

Confidence comes from preparation you trust. Maintain a “victory log” where you record small wins — a fully solved game‑theory matrix, a 25‑mark essay that received a high grade, or a complex data set you interpreted correctly. Review this log before the competition to remind yourself of your capability. Edexcel’s rigorous assessment has already trained you to handle time pressure and complex mark schemes; view the competition as a chance to showcase that expertise in a broader arena.

自信源自你信任的准备工作。维护一本“胜利日志”，记录小成就——完全解出的博弈论矩阵、获得高分的 25 分论文，或你正确解读的复杂数据集。赛前重温这些记录，提醒自己拥有的能力。Edexcel 的严格评估已训练你应对时间压力和复杂评分方案；把竞赛视为在更广阔舞台展示这一专长的机会。

12. After the Competition: Reflection and Next Steps | 赛后：反思与后续步骤

Regardless of the outcome, the competition experience enriches your A‑Level profile and university application. Take time to reflect on what you learned: which economic models proved most useful, what gaps in your knowledge were exposed, and how you performed under pressure. Write a short post‑mortem that you can refer to when preparing for university interviews or future competitions. Many top universities, including those in the Russell Group, view competition participation as a strong signal of intellectual curiosity and the ability to go beyond the curriculum — exactly what Edexcel high‑achievers aspire to demonstrate.

无论结果如何，竞赛经历都能丰富你的 A‑Level 档案和大学申请。花时间反思所学：哪些经济模型最有用，暴露了哪些知识缺口，以及你在压力下的表现如何。撰写一份简短的赛后总结，以便未来准备大学面试或其他竞赛时参考。许多顶尖大学，包括罗素集团院校，将竞赛参与视为求知欲和超越课纲能力的有力信号——这正是 Edexcel 高材生希望展现的。

Finally, channel your competition insights back into your Edexcel revision. The wider reading, data analysis and evaluation skills you honed will directly improve your performance in Paper 1–3, especially in the synoptic questions where breadth of understanding is rewarded. Consider mentoring younger students or starting an economics society at your school to share what you have learned. Teaching others deepens your own mastery and cements the knowledge for the final A‑Level push.

最后，将竞赛洞见回馈到 Edexcel 复习中。你所磨练的广泛阅读、数据分析和评估技能将直接提升你在 Paper 1–3 中的表现，尤其是在注重理解广度的综合题中。考虑指导低年级学生，或在校内创办经济学社团以分享所学。教授他人能深化你自己的掌握，并为 A‑Level 最后冲刺巩固知识。

Published by TutorHao | Economics Revision Series | aleveler.com

更多咨询请联系16621398022（同微信）

Year 13 Edexcel Economics: Preparing for International Economics Competitions | 国际竞赛备战攻略