| 托福考试易错题（2018/1/11） |
| 第1题：Niagara Falls (is) not (only one) of (North America’s greatest) tourist attractions but (also source) of hydroelectricity.
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| 【分析题】： |
| 第2题：The oxygen of the atmosphere, (so) essential to (many of) forms of life, (represents) the accumulated product of over 3,500,000,000 years of photosynthesis (by) green plants.
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| 【分析题】： |
| 第3题： Many dinosaurs were (so much) heavy that they (spent) most of their lives in swamps and shallow lakes (where) water (could support) them. A．so much B．spent C．where D．could support |
| 【单选题】： |
| 第4题： After the United States became independent, the cure of more fertile lands drew steadily New Englanders into the Ohio Valley and the British colony of Upper Canada.
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| 【单选题】： |
| 第5题： The (conceptual) of (musical) harmony is (generally) traced to the ninth century because it is first (mentioned) in treatises of that period. A．conceptual B．musical C．generally D．mentioned |
| 【单选题】： |