It's time _____go to school.A.for B.to C.in D.at 为什么选B?

It's time _____go to school.A.for B.to C.in D.at 为什么选B?
It's time _____go to school.A.for B.to C.in D.at 为什么选B?

It's time _____go to school.A.for B.to C.in D.at 为什么选B?
B
是干什么事的时候了
It is time to do sth
It is time for sth
It is time + 从句 （用虚拟语气）

it is to do something ,是it is的句型的基本用法~语法书上就有。

It is time to do sth
It is time for sth/doing sth

根据It is time to do sth .这个句式 to 的后面必须跟动词原形。而这句话中的go就是动词原形所以必须选B 另外一个句式It is time for sth . for 的后面要跟名词或动名词。这两个句式都当该干某事的时候了。