托福阅读真题及答案（2）

托福阅读真题及答案（2）

paragraph 2

Although the climate changed at the end of the Pleistocene,warming trends had happened before.A period of massive extinction of large mammals like that seen about 11,000 years ago had not occurred during the previous 400,000 years,despite these changes.The only apparently significant difference in the Americas 11,000 years ago was the presence of human hunters of these large mammals.Was this coincidence or cause-and-effect?

4.In using the word“coincidence”in the passage,the author refers to events that occurred

A.after a period of many years

B.subsequent to a prediction

C.from time to time

D.at the same time and by chance

正确答案：D

5.According to paragraph 2,what suggests that human activity played a role in the extinction of mammals about 11,000 years ago?

A.Climate changes that would have favored human population expansion occurred at the time of the extinctions.

B.The presence of human hunters had caused animal extinctions in other time periods.

C.There was a pattern of climate change earlier than 11,000 years ago that had not caused animal extinctions.

D.Harmful climate changes 11,000 years ago would have required humans to hunt larger numbers of animals for food.

Paragraph 2 is marked with an arrow

正确答案：C