Question

It is reported that two schools，________ are being built in my hometown，

will open next year.
A．they both
B．which both
C．both of them
D．both of which
请翻译，并分析。
答案 D

Answer 1

It is reported that two schools,________ are being built in my hometown,
will open next year.
A．they both
B．which both
C．both of them
D．both of which

D是正确的

句子有逗号，因此是两句话。两句话没有连词，只能用which做非限制定语从句，而题目中有语义表明是两者都（原来的表达是both of them），加上which 只能表达为 both of which，which做后半句的主语。

如果有连词and, 才能用A，C选项。

翻译：据报道，在我的家乡正在建的两所学校将于明年启用。
语法规则是这样的：
both of which 引导一个非限制性定语从句。如果把定语从句单独拿出来成一句话，就是：Both of the two schools are being built in my hometown。 如果不会用这样的定语从句，不妨先把两句话拆开来看：
It is reported that the two schools will open next year。
Both of the two schools are being built in my hometown。
然后确定哪一个当定语从句，当然是后者了。然后在定语从句中照到和主句中的被修饰词一样的那个词，也就是先行词the two schools， 再把这个词变成关系代词，最后把整个定语从句置于被修饰词的后面，就成了。
选择题采用排除法，那是考试时才用的办法，平时学习还是“知其所以然”才行。

Answer 2

D正确

句子有逗号，因此是两句话。两句话没有连词，只能用which做非限制定语从句，而题目中有语义表明是两者都（原来的表达是both of them），加上which 只能表达为 both of which，which做后半句的主语。

如果有连词and, 才能用A，C选项。