问题详情:
No matter how bright a talker you are,there are times when it's better ________ silent.
A.remain B.be remaining
C.having remained D.to remain
【回答】
D [it作形式主语,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也可以作形式宾语,如find/feel it +to do/that...。 ]
知识点:非谓语动词
题型:选择题