语法与词汇
7.
The desegregation was achieved through a number of struggles,_____have been mentioned in previous chapters.
A、
a few of which
B、
a few of them
C、
a few of those
D、
a few of that
【正确答案】
A
【答案解析】
这里考的是非限制性定语从句，关系代词which前加修饰语。
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