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1.Farming emerged as a survival strategy because man had been obliged__________．
A) to give up his former way of life
B) to leave the coastal areas
C) to follow the ever-shifting vegetation
D) to abandon his original settlement
2. Earth scientists have come to understand that climate____________.
A)is going through a fundamental change
B)has been getting warmer for 10,000 years
C) will eventually change from hot to cold
D) has gone through periodical changes
3.Scientists believe that human evolution________.
A) has seldom been accompanied by climatic changes
B) has exerted little influence on climatic changes
C) has largely been affected by climatic changes
D) has had a major impact on climatic changes
4.Evidence of past climatic changes indicates that__________.
A) human activities have accelerated changes of Earth's environment
B) Earth’s environment will remain mild despite human interference
C) Earth's climate is bound to change significantly in the future
D) Earth's climate is unlikely to undergo substantial changes in the future
5.The message the author wishes to convey in the passage is that______________.
A) human civilization remains glorious though it is affected by climatic changes
B) mankind is virtually helpless in the face of the dramatic changes of climate
C) man bas to limit his activities to slow down the global warming process
D) human civilization will continue io develop in spite of the changes of nature
