Question

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

1. A.
   as
2. B.
   until
3. C.
   before
4. D.
   after

Answer 1

A
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。