<正>1.The factory Was built in a secret place,aroundhigh 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。
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