very important to have good eating habits.A. That’sB. It’sC. He’sD. This is

问题补充：

very important to have good eating habits.

A. That’s

B. It’s

C. He’s

D. This is

答案：

A. That’s

(答案→)B. It’s

C. He’s

D. This is

解析：句意：一个好的饮食习惯是非常重要的。it作为形式主语，后面的不定式to have good eating habits作为真正的主语，故选B.