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【题目】—I often have hamburgers for lunch.

—You'd better not.It's a bad habit ________ too much junk food(垃圾食品)

A. eatB. to eat

C. eatingD. to eating

【答案】B

【解析】

句意:--我经常午饭吃汉堡。--你最好不要这样。吃太多垃圾食品是一个不好的习惯。根据句意可知这里吃太多垃圾食品作句子的主语,句首it是形式主语,故后面要用to do 不定式作真正的主语,故选B

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