问题
选择题
—May I go outside and play for a while, Dad?
—No, you can’t ____ your homework is being done.
A.until
B.as
C.before
D.the moment
答案
答案:B
考查连词;A. until直到B. as 当…时候,因为C. before在…之前,D. the moment一…就,句意:--我可以出去玩一会吗?--不,你不能,因为你正在做作业。选B。