| 托福考试易错题（2017/9/20） |
| 第1题：（） to stand in a warm place, it sours because of the presence of bacteria that convert milk sugar into acid. A. When milk is allowed B. When is milk allowed C. Milk, when allowed D. When milk allowed |
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| 第2题：The portrayal of everyday life in the objects of folk art makes it （） valuable source of history. A. and a B. so that a C. a D. is a |
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| 第3题：At the time of Columbus’ voyages, Native Americans used an astounding diversity of languages, （）_ the diversity used by Europeans. A. the greatest by far B. by far than greater C. by far the greatest D. greater by far than |
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| 第4题：About 75 percent of all cadmium is used for cadmium plating of （） such as iron and steel. A. easily corroded metals B. metals are easily corroded C. corroded metals that easily D. how easily metals corroded |
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| 第5题：（） carries the genes, which determine the hereditary characteristics of the cell or organism. A. The chromosome B. The chromosome that C. Whereas the chromosome D. There is a chromosome |
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