While my mother________ some washing, I was making  a kite for Mary. 
#40261
A
did
B
was doing
C
is doing
D
does
推荐题目
I don’t know if my uncle_______. If he______, I will be very happy.
#38498
A
comes; will come
B
will come; will come
C
comes; comes
D
will come; comes
--Do you know when Jim     _________ ?---I don’t know. As soon as he      , I will call you.
#36676
A
will arrive ; arrives
B
arrives ; will arrive
C
will arrive ; will arrive
D
arrives ; arrives
Look! Who ___________ on the blackboard?
#41779
A
writes
B
is writing
C
are writing
D
writing