| 托福考试易错题（2018/9/28） |
| 第1题： The human skin forms-----against the action of physical, chemical, and bacterial agents on the deeper tissues.
A．a protective barrier is B．a protective barrier C．a barrier and protective D．when a protective barrier |
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| 第2题： According to paragraph 2, evidence from fossils suggests that A．( extinction of species has occurred from time to time throughout Earth's history B．( Extinctions on Earth have generally been massive C．( there has been only one mass extinction in Earth's history D．( dinosaurs became extinct much earlier than scientists originally believed |
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| 第3题： The word "heightened" in line 18 is closest in meaning to A．( complicated B．( directed C．( observed D．( increased |
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| 第4题： According to the passage, scientists cannot explain which of the following aspects of squirrel behavior A．Where squirrels store their acorn caches B．Why squirrels prefer acorns over other seeds C．Why squirrels eat only a portion of each acorn they retrieve D．Why squirrels prefer acorns from a particular species of oak trees |
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| 第5题： (Fossil) records support the assumption (which) microorganisms (were) the first forms (of life). A．Fossil B．which C．were D．of life |
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