题目内容

Great changes______ in the city since1970.
A．have been taken placeB．have taken place.
C．has taken placeD．took place
B

试题分析：句意：自从1970年，在这座城市里发生了很大的变化。分析从时间上体现了现在完成时，主语又是复数形式，因此用take place发生，现在完成时形式。故选B
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