—I often have hamburgers for lunch.— You’d better. It’s bad for you too much junk food. A

问题补充：

—I often have hamburgers for lunch.

— You’d better. It’s bad for you too much junk food.

A. eat

B. to eat

C. eating

D. ate

答案：

A. eat

(答案→)B. to eat

C. eating

D. ate

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。