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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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