单项选择题

It is high time that we ______some measures to deal with the water pollution.

[A] will take
[B] must take
[C] took
[D] shall take
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单项选择题
A university is not just a place to ______knowledge passed on to us from the past, it should be a place to explore new ideas.
[A] inquire
[B] require
[C] acquire
[D] squire
单项选择题
If you had taken his advice, this ______.
[A] will not have happened
[B] did not happen
[C] would not have happened
[D] had not happened
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