Look! Those boys football.A. are playB. are playingC. playingD. play

问题补充：

Look! Those boys football.

A. are play

B. are playing

C. playing

D. play

答案：

A. are play

(答案→)B. are playing

C. playing

D. play

解析：look意思为看的意思，引起别人的注意，所在的句子通常用现在进行时，结构为be+doing，故本题选B。