--Dad why should I stopcomputer games?For your health my boy I’m afraid you.A. to pl

问题补充：

--Dad, why should I stopcomputer games?

--For your health, my boy, I’m afraid you.

A. to play; must

B. playing; have to

C. to play; can

D. playing; may

答案：

A. to play; must

(答案→)B. playing; have to

C. to play; can

D. playing; may

解析：have to 表示不得不，被逼的，而stop to do sth，表示停下去做某事，stop doing sth，表示停下手头正在进行的事，故选B