While Helen ________ the piano，her mother came in．
#39922
A
was playing
B
is playing
C
played
D
plays
推荐题目
There are many people downstairs. What do you think ______?
#42822
A
to happen
B
happening
C
is happened
D
has happened
Our life _________ greatly in the last ten years.
#39738
A
changed
B
has changed
C
have changed
D
is changed
By the time I got to the cinema,the movie _______ for ten minutes.
#42286
A
had begun
B
had been on
C
has started
D
has been on
----- Did you go to Sam's weekend party? ----- No, I ______________.
#38368
A
am not invited
B
wasn't invited
C
haven't invited
D
didn't invite
–What did the radio say just now?- Sorry. I didn’t catch it. I _____ something else.
#36632
A
think
B
will think
C
was thinking
D
had thought