It’s ten o’clock. The children are a good time.A. havingB. doingC. takingD. playing

问题补充：

It’s ten o’clock. The children are a good time.

A. having

B. doing

C. taking

D. playing

答案：

(答案→)A. having

B. doing

C. taking

D. playing

解析：本题表示的是具体时间用现在进行时，have a good time表示玩得开心，与本题的题意相符，故本题选A。