单项选择题

If the experiment succeeds or fails, it will provide us with valuable experience which is essential to improving our future work.()

A. If
B. provide us
C. experience
D. improving

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For several years now, the student body is attempting to gain more influence over university policies.()

A. For several years now
B. is attempting
C. more
D. over
单项选择题
However it is you have heard, you'd better ask him about it in person.()

A. However
B. it is
C. you'd better
D. in
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