单项选择题

It is necessary that an efficient worker ______ his work on time.

A．accomplishes
B．can accomplish
C．accomplish
D．has accomplished
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单项选择题
The politician urged that all citizens ______ to the polls on election day.
A．had gone
B．went
C．must go
D．go
单项选择题
Don't ______ to let me know if there is anything I can do for you.
A．reject
B．prevent
C．hesitate
D．refuse
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