问题

Mary didn’t know who _______ the problem she met with at that time.
A:go
B:went
C:have been
D:was going;
B:went
C:have been
D:was going;
正确答案是:
同类题型
I have great ________ in finishing the work by myself. Could you help me — No problem.
Look! It ____ hard now. You’d better wait for a while until it stops.
-It’s one of the things in the world to stay with friends.-I agree. It always makes us relaxed.
The special clothes are _____ for the children who are disabled.