单项选择题

When he was alive, the old scientist used to say that knowledge ()from practice and he gained his experience by doing a lot of practical work.

A. was coming
B. had come
C. comes
D. would come

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单项选择题
The way he had the problem () his ability.

A. settling showed
B. settling showing
C. settled showed
D. settled showing
单项选择题
There’s no need (). We have got plenty of time.

A. having
B. to hurry
C. to be hurried
D. being hurried
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