单项选择题

What we have to take （）the courses offered only for this term.

A. are
B. is
C. have been
D. has been

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单项选择题

They talked and talked as if they（）never meet again.

A. will
B. would
C. should
D. shall

单项选择题

There is a computer system （） the company is experiencing problems.

A. with which
B. as which
C. such as
D. for such

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