题目内容

It is necessary for us________ good habits in our daily life.
A．keepB．to keepC．keepingD．kept
B
考查句型：it’s+形容词+for sb to do sth表示对某人来说做某事怎样。It 作形式主语，真正的主语是后面的不定式，句意：在我们的日常生活中对我们来说保持良好的习惯是必要的。所以选B。
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