单项选择急需答案并说明理由

问题描述:

单项选择急需答案并说明理由
Great changes ( ) the last three years.A have taken place B have been taken place C have haappened D have been haappened
1个回答 分类:英语 2014-11-18

问题解答:

我来补答
A have taken place
主语是Great changes,而且他是主动的,所以B、D不行.haappened不能这样用,所以C不行.
 
 
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