——May I go to play football with Mike now Dad? ——No you can’t go out your homework is b

问题补充：

——May I go to play football with Mike now, Dad?

——No, you can’t go out your homework is being done.

A. as

B. until

C. before

D. after

答案：

(答案→)A. as

B. until

C. before

D. after

解析：考查连词。as作“因为，由于”之意。句意：你不能出去，因为你正在完成你的家庭作业。