单项选择题

It ______ months since we ______ in Shanghai.

A. has been; were
B. is; are
C. was; had been
D. had been; have been
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The law requires that everyone ______ his car checked at least once a year.
A. has
B. would have
C. have
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Care should be taken to decrease the length of time that one is ______ loud continuous noise.
A. subjected to
B. filled with
C. associated with
D. attached to
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