单项选择题

（）we know, smoking is harmful for our health.

A. So far as
B. So far
C. So long as
D. As to

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单项选择题

So many comrades（）absent, we decided to put the meeting off.

A. are
B. to be
C. being
D. be

单项选择题

（）people say, I believe he is innocent.

A. Whenever
B. However
C. Whoever
D. Whatever

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