单项选择题

There is less crime now than there used to be. It seems that there is a （） in the crime rate.

A. slope
B. incline
C. descent
D. decline

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单项选择题
I'd just as soon （） those important papers with you.

A. that you won't take
B. you not taking
C. you don't taken
D. you didn't take
单项选择题
He's working hard for fear that he（）

A. should fall behind
B. fell behind
C. may fall behind
D. would fall behind
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