The satellite launching center was built in a secret place,around __ high mountains.
问题描述：
The satellite launching center was built in a secret place,around __ high mountains.
A which was B it was C which were D them were
答
C
这是用了全部倒装语序的定语从句,介词around 前置,指物,只能用which ,这样可排除B,D
由于主语high mountains是复数,故选复数谓语C