单项选择题

The experiment requires more money than （）

A. have been put in
B. being put in
C. has been put in
D. to be put in

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In 1997, an Indonesian pilot killed （） on board.

A. 44
B. 68
C. 104
D. 166
单项选择题
China’s average import duties will be reduced by（）percent after entering WTO.

A. 10
B. 7
C. 5
D. 3
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