On Saturday afternoon, Mrs Green went to the market, _______ some bananas and visited her coursin.
A. bought
B. buying
C. to buy
D. buy
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As awful accident ________, however, occur the other day.
A. does
B. did
C. has to
D. had to
She ______ her hairstyle in her hometown before she came to Chongqing for a better job.
A. would change
B. has changed
C. had changed
D. was changing
After a fire broke out in the lab, a lot of equipment________.
A. is damaged
B. had damaged
C. damaged
D. was damaged
What we used to think ______ impossible now does seem possible.
A. was
B. is
C. has been
D. will be
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