单项选择题

No one could come up with an easy solution to the government’s predicament—labor（）which is caused by the wars.

A.decline
B.vacancy
C.rarity
D.shortage

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单项选择题
The committee is totally opposed（）any changes being made in the plans.

A. of
B. on
C. to
D. against
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Don’t rest on your laurels;（）your success and start looking for new markets now.

A. add up
B. follow up
C. work up
D. count up
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