典型陷阱题分析 1. the factory was built in a secret place, around ______ high mountains. a. which was b. it was c. which were d. them were 【陷阱】容易误选a或b，将a、b中的 which 和 it 误认为是其后句子的主语。 【分析】最佳答案是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.
