单项选择题

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 effected by climatic changes
D．has had a major impact on climatic changes
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单项选择题
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 has to limit his activities to slow down the global warming process
D．human civilization mill continue to develop in spite of the changes of nature
单项选择题
By saying that It's an image that will boggle the mind for years to come, (the last sentence in paragraph 2) the author means that______.
A．the WTO is likely to have a bad image in people's mind in the future
B．the startling scene will hang in people's mind in the years to come
C．the WT0 will have a difficult time changing people's way of thinking in the furture
D．people will lose whatever confidence they have in the future of the WTO
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