问题
选择题
The factory was built in a secret place, around ______ high mountains.
A．which was
B．it was
C．which were
D．them were
答案
答案：C
around which were high mountains 是一个由“介词+which”引出的非限制性定语从句，而在该从句中，主语是 high mountains，around which 是表语，所以句子谓语应用复数were，而不是用单数 was。