问题
Great changes____in the city, andalot offactories____.[ ]
A: have been taken place;have been set up
B: have taken place; have been set up
C: have taken place; have set up
D: were taken place; were set up
B: have taken place; have been set up
C: have taken place; have set up
D: were taken place; were set up
正确答案是：
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