摘要：2039] Hidden by a big tree, his house was not to be seen. [译文] 由于隐藏在一棵大树后面.他的房屋是看不见的. A. as it was B. as it is C. as it did D. as he did [答案及简析] A. as 引导的让步状语从句.要倒装,主句是过去时态.当然从句的时态要和主句的一致.

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