Great changes have taken place ...in china

问题描述:

Great changes have taken place ...in china
A.taken place
B.happened
C.been taken place
D.been happened

take place,和 happen 都是不及物动词,不能用于被动语态,故首先排除 C D
再由于happen 一般指意料之外的事情,如突发事故等,这样可排除B
take place 一般指的是意料之中的事情,所以答案为 A