问题 选择题
No matter how bright a talker you are, there are times when it's bettersilent.
A.remainB.be remaining
C.having remainedD.to remain
答案

D

【考点】非谓语不定式,it做形式主语,真正的主语是后面的不定式:to remain silent. 可归结为句型:it is +形容词/名词+to do/that…。当然it也可以做形式宾语,如find/feel it +to do/that….。

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