—I often have hamburgers for lunch. — You’d better not. It’s bad for you ______ too much junk food.

 —I often have hamburgers for lunch.
— You’d better not. It’s bad for you ______ too much junk food.
A. eat B. to eat C. eating D. ate
【答案】B
【解析】
动词不定式。It为形式主语，动词不定式to eat too much junk food 作真正的主语。