题目内容
I think it’s important ______ healthy.
A.keep | B.keeping | C.keeps | D.to keep |
D
整个句子是宾语从句。分析从句,it是代词,是句子的形式主语,真正的主语是不定式to keep healthy,选D.
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题目内容
A.keep | B.keeping | C.keeps | D.to keep |