Question

【题目】Don't try to do everything at once. Do one ________．

A. at times B. at any time

C. at a time D. at all times

Answer 1

【答案】C

【解析】句意：不要试图同时做每件事。一次做一个。考查介词短语辨析题。A. at times有时，间或，相当于sometimes；B. at any time随时，任何时候；C. at a time依次，每次；D. at all times每时每刻，相当于always。根据句意语境，可知ABD三项意思都与句意不合，故选C。