单选题
The seminar will adjourn ______ five o'clock.
A、
(A) in
B、
(B) on
C、
(C) at
D、
(D) the
【正确答案】
C
【答案解析】
At is the correct preposition for a specific time. Choice (A) means during (or at the end of) a period of time. Choice (B) is incorrect for a specific time. Choice (D) is an article.
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