单项选择题

Great changes ______ in our home country over years ago.

A. had taken place
B. took place
C. have taken place
D. were taken place
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单项选择题
She was told the examination ______ on Friday.
A. will be given
B. would be given
C. to be given
D. is given
单项选择题
Just as we reached the bus stop, the bus ______ by us.
A. passed
B. had passed
C. was passing
D. would pass
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