.Do you spend an hour badminton every day?A. playB. playingC. playsD. to play

问题补充：

.Do you spend an hour badminton every day?

A. play

B. playing

C. plays

D. to play

答案：

A. play

(答案→)B. playing

C. plays

D. to play

解析：考查固定结构。spend an hour（in）doing sth .所以选B。