问题
选择题
I think it’s important ______ healthy.
A．keep
B．keeping
C．keeps
D．to keep
答案
答案：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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I think it’s important ______ healthy.
A．keep
B．keeping
C．keeps
D．to keep
答案：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.