单项选择题

Every director needs an assistant that he can ______ to take care of problems that may occur in his absence.

A．count on
B．count for
C．count down
D．count out
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单项选择题
The word poem is concrete, ______ poetry is abstract.
A．when
B．as
C．while
D．since
单项选择题
Although Mike worked ______ , he could ______ support his family.
A．hard, hard
B．hard, hardly
C．hardly, hard
D．hardly, hardly
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