单项选择题

Scientists generally agree that the earth’s climate will warm up over the next 50 to 100 years ______ it has warmed in the 20000 years since the Ice Age.

A. as long as


B. as much as
C. as soon as


D. as well as
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单项选择题
The millions of calculations involved, had they been done by hand, ______ all practical value by the time they were finished.
A. could lose


B. would have lost
C. might lose


D. ought to have lost
单项选择题
The world's greatest sporting event, the Olympic games, upholds the amateur ideal that ______ matters is not winning but participating.
A. anything
B. it

C. what

D. everything
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