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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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
单项选择题
He ______ his speech by calling for a vote of thanks for last year's president.
A．got up
B．wound up
C．stayed up
D．made up
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