问题

Mary ______ her homework when her mother got home yesterday.
A:does
B:did
C:is doing
D:was doing ;
B:did
C:is doing
D:was doing ;
正确答案是:
同类题型
He’s got our tickets.—That’s good I ________afraid that he ________them
There are many stone lions on ______ sides of the bridge. They are all different from each other.
We didn’t know you were in trouble at that time _____, we would have given you a hand [ ]
The two pairs of shoes are __________the same colour.——But they are different __________colour.