There are many boysfootball in your school.A. playB. playsC. are playingD. playing

问题补充：

There are many boysfootball in your school.

A. play

B. plays

C. are playing

D. playing

答案：

A. play

B. plays

C. are playing

(答案→)D. playing

解析：在你们学校有很多男孩正在踢足球。结合前文助动词are可知本句描述的是正在进行的动作，故选D。