问题
选择题
Great changes __________ in China in the past few years.
A． were taken place
B． took place
C． have been taken place
D． have taken place
答案
答案：D
由 in the past few years 可知要用现在完成时，且take place 没有被动语态。
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Na2H3IO6。下列有关该反应的说法中正确的是 [ ]