问题
选择题
The police have started an ___ into the cause of the fire which broke out in the hotel last night.
A．appreciation
B．investigation
C．operation
D．extension
答案
答案：B
词义辨析。A.欣赏；鉴别B.调查 C.操作；经营 D. 延长；延期。句意：警方开始调查昨晚在这家旅馆爆发的这起火灾的起因。故选B。