问题补充：
Could it be in the room we had a talk last night you left your keys ?
A. that; where
B. in which; where
C. where ; that
D. where ; where
答案：
A. that; where
B. in which; where
(答案→)C. where ; that
D. where ; where
解析：考查定语从句和强调句型。本题第一空where we had a talk last night修饰先行词the room.第二空是强调句型的结构that。句意：就是在我们昨天谈话的难过房间里，你丢了钥匙吗？故C正确。
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