单项选择题

Tell him he should stop () and get some sleep.

A.worry
B.worrying
C.to worry
D.from worrying

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单项选择题
Mack is very busy; he is a full-time student, while () a part-time job.

A.to hold
B.being held
C.held
D.holding
单项选择题
Kate is an honest girl; I say it, () I don't like her.

A.as if
B.as long as
C.as though
D.even if
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