We can gain valuable wisdom from mistakes which ______ to prevent them from happening again．（　?。?/h1>

A．should be avoided

B．might be avoided

C．must have been avoided

D．could have been avoided

【答案】D

【解答】

【點評】

聲明：本試題解析著作權屬菁優(yōu)網所有，未經書面同意，不得復制發(fā)布。

發(fā)布：2024/4/20 14:35:0組卷：15引用：3難度：0.9

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A．could have given	B．mustn't give
C．couldn't give	D．must have given

A．should have gone	B．can't have gone
C．might have gone	D．needn't have gone

We can gain valuable wisdom from mistakes which ______ to prevent them from happening again．（ ?。?/h1>