单选题
Due to popular demand by the staff members, the scheduled talk by Mr. Smith will take place ______Room 15 instead of Room 20 as was first planned.
A、
in
B、
on
C、
of
D、
as
【正确答案】
A
【答案解析】
本题需选择适当的介词。会议室、办公室等密闭场所前用介词in。故答案为(A)。
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