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.
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A
was coming
B
had come
C
comes
D
would come
推荐题目
 I ___ happy about the price of eggs.
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A
am’t
B
am not
C
do not
D
won’t
In such a fierce competition, a person has to make every effort if he ______ .
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A
has succeeded
B
is to succeed
C
would succeed
D
will succeed