The students _______ busily when Miss Brown went to get a book she _______ in the office.
#103023
A
had written; left
B
were writing; has left
C
had written; had left
D
were writing; had left
推荐题目
Two building workers got seriously wounded when the stadium _______. 
#99780
A
was built
B
was being built
C
built
D
is being built
 __many times, he still didn’t make sense of it.
#101521
A
Having been told
B
Then he was told
C
Being told
D
He was told
--I hope you liked the movie last night.--How on earth do you know I went to the cinema? I ______you.
#100157
A
haven’t told
B
hadn’t told
C
didn’t tell
D
wouldn’t tell