(单选题)

The second factory I used to work is built in a secret place, around high mountains.

A.that; which

B.where; which

C.where; which are

D.that; which are

参考答案：C

参考解析：

考查关系副词where的用法和关系代词which的用法。句意：我曾经工作过的第二个工厂建在一个秘密的地方，四周是高山。work是不及物动词，所以第一空后面是个不缺成分的限制性定语从句，用关系副词where在定从内部作地点状语，引导定语从句。around是介词，后面缺少关系代词充当around的宾语，此处指物，所以用which；地点介词位于句首时，句子采用完全倒装，所以空格处系动词are放在high mountains前面，故选C。

知识点：

The second factory ______ I used to work is built in a secret place, around ______ high mountains.

The second factory I used to work is built in a secret place, around high mountains.