No matter how bright a talker you are,there are times when it's better _____ silent.[ ] A.remainB.be remainingC.having remained D.to remain 求详解

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Nomatterhowbrightatalkeryouare,therearetimeswhenit''sbetter_____silent.[]A.remainB.beremainingC.havin

No matter how bright a talker you are,there are times when it's better _____ silent.[ ] A.remainB.be remainingC.having remained D.to remain 求详解
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
求详解

No matter how bright a talker you are,there are times when it's better _____ silent.[ ] A.remainB.be remainingC.having remained D.to remain 求详解
答案是D
it(形式主语)is(系动词) better (表语)to keep silent (正真主语)