题目内容

You were not （）very hard when I saw you in the library yesterday

A. studied
B. study
C. studying
D. studies

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The deadline （）extended. We have a little more time now

A. was being
B. would be
C. has been
D. had been

My computer isn't working. It （）be broken

A. will
B. must
C. need not
D. can't

You'd better () that next time.

A. not to say
B. not said
C. not saying
D. not say

It is everybody's () to keep the city clean.

A. matter
B. affair
C. business
D. thing