You must notice the emergency exit is when you enter the buildingA. whichB. where C. wha

You must notice the emergency exit is when you enter the building．
A. which
B. where
C. what
D. in which

A. which(答案→)B. where C. whatD. in which解析：句意：你必须注意当你进入一个建筑物时，它的紧急出口在哪里。where表示在哪里，在动词之后引导宾语从句，故选B

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