Don’t all speak at once! , please. A. Each at one time B. One by one time C. One
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Don’t all speak atonce! _____ , please.
A. Each at onetimeB. One by one time
C. One for each timeD. One at a time
试题答案
答案：D
解析：| 本题意为“不要所有的人都同时说，每次一个人说”。at once在本句中意为atthe same time（同时），而不是immediately（立刻、马上）；at one time同时，曾经。Byone time和for each time在句子中均无意义。
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