The museum will open in the spring with an exhibition and a viewing platform visitors can watch the big glasshouses being built.
A. what
B. where
C. when
D. why
网友回答
A. what
(答案→)B. where
C. when
D. why
解析：句意：博物馆会在春天向公众开放，届时会有展览和现场表演，观众会看到一个玻璃屋的现场建造工程。定语从句，先行词a viewing platform在从句中做地点状语，故选B。定语从句关系词的选用有三步：一找准先行词；二判断先行词在从句中充当的成分；三确定具体的关系词。
【考点定位】考查定语从句关系词的选用。