单项选择题

Another worry is that telecommunication systems may isolate people（）each other.

A. from
B. for
C. with
D. to

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单项选择题

Because of his degree， he refused to do（）he thought “low” work.

A. that
B. what
C. which
D. who

单项选择题

If I（） in your place， I wouldn‘t trouble him.

A. were
B. had been
C. could be
D. was to be

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