单项选择题

He looks as if he ______ nothing about the news.

A. would know

B. would have known
C. knew

D. should know
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单项选择题
Attending to a wife and six children () most of his time.

A. gives up
B. eats up
C. takes up
D. breaks up
单项选择题
She has been working in this factory ().

A. in 1980
B. after 1980
C. since 1980
D. until 1980
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