问题补充：
They moved to England in and lived in a big house, to the south.
A. the windows of which opened
B. the windows of it opened
C. its windows opened
D. the windows of which opening
答案：
(答案→)A. the windows of which opened
B. the windows of it opened
C. its windows opened
D. the windows of which opening
解析：考查定语从句：句意：他们在搬到英国，住在一个大房子里面，房子的窗户向南开。这是定语从句，先行词是a big house，定语从句中用of which 的作用相当于whose….的，本句相当于 They moved to England in and lived in a big house，whose window opend to the south.窗户向南开是主动，而且是过去时：opened。D项的定语从句，没有谓语，BC是独立主格结构，但是the windows和open这里是主动关系，用现在分词，所以选A。
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