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
They lay almost flat and ______ through the tube like underground passage.
A．climbed
B．crawled
C．slid
D．glided
单项选择题
I am very envious ______ your new job.
A．of
B．for
C．to
D．at
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