Last Sunday they reached Qingdao, a conference was to be held．A.whichB.thatC.whe
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Last Sunday they reached Qingdao, ________ a conference was to be held．
A.which
B.that
C.when
D.where
试题答案
D
解析：先行词是Qingdao，表示地点，要填where引导定语从句并在从句中作地点状语。