【题目】I will put the book________you placed it and make a mark at the place________I put it.
A．where；at which
B．at which；at which
C．where；which
D．at which；where
在线课程【答案】A
【解析】这句的意思是我会把书放在你放这本书的地方并在那里做一个记号.where在这里引导一个地点状语从句,儿at which 在这里是引导一个定语从句.所以选A.