it's time _____ have music class.a for b to

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it's time _____ have music class.a for b to
it's time _____ have music class.a for b to

it's time _____ have music class.a for b to
b
to是不定式符号,后跟动词原形的have,而for是介词,要跟动名词的having

to

B
这里知识点有两个句型
it is time to do somthing
or it's time for something
从句子中可以看到后面是 have music class
所以用 to