My brother came back home while I           homework.
#36261
A
am doing
B
did
C
was doing
D
were doing
推荐题目
What ________when we were in the barber shop?
#37349
A
happened
B
was happened
C
happening
D
would happen
Don’t worry. The plane ______ at 8 a.m. There is still time left.
#38123
A
arrive
B
will arrives
C
arrived
D
arrives