Great changes _______ in our country since 1990.
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A
were taken place
B
took place
C
have taken place
D
have been taken place
推荐题目
I haven’t seen you ____________.
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A
for two months
B
since three weeks
C
since last Monday ago
D
two days ago
When I called Mr. Li, he and his wife ________ in the rain.
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A
trapped  
B
were traped
C
were trapped 
D
were trapping
If your homework ________ , you may watch TV for half an hour.
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A
is finished
B
will be finished
C
has finished
D
will finish