-Where is Jack?----He football on the playground with those AFS students but I am no

问题补充：

---- Where is Jack?

----He football on the playground with those AFS students, but I am not sure.

A. must be playing

B. must have played

C. may be playing

D. may have played

答案：

A. must be playing

B. must have played

(答案→)C. may be playing

D. may have played

解析：可联系答.案.网客服索取。