Question

【题目】He asked them to come to his office one ________.

A.at no timeB.at one timeC.at a timeD.in no time

Answer 1

【答案】C

【解析】

考查介词短语辨析。句意：他要求他们一次一个到他的办公室。A. at no time从不；B. at one time曾经；C. at a time一次；D. in no time立刻。结合句意可知，此处用“一次”符合语境，one at a time“一次一个”，故选C项。