When Madam Cuirie did the science experiement again, she was more careful where she _____ a mistake.
#104920
A
made
B
has made
C
was making
D
had made
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----Any news about Bill Clinton? ----He left power three years ago and has a little now and a little then been ______.
#104448
A
heard of since
B
heard since
C
heard before
D
heard of before
By the time I got to the office, the meeting ______.
#100849
A
had begun
B
began
C
was beginning
D
would begin
I _______ online games for two years, but I’ve never regretted giving it up.
#100083
A
play
B
was playing
C
played
D
had played
The old city wall ______ in the Ming Dynasty.
#103432
A
was been built
B
has been built
C
was built
D
had been built
---Where are your parents? ---They are in the kitchen, they ______the dinner for the party the whole day.
#100575
A
are preparing
B
have been prepared
C
have been preparing
D
were preparing