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。 1.The factory Was built in a secret place, around ____ high mountains.A.which was B.it was C.which were D.them were [Trap] Easy to mistakenly choose A or B, A and B which and it wrong Considered the subject of the subsequent sentence. [Analysis] The best answer is C, around which were high mountains is a non-restrictive attributive clause derived from ”preposition + which ’, in which the subject is high mountains and around which is a table of words, so sentences The predicate applies plural rather than singular was.