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9.―Whyareyousodownmylittleboy?―Ithasbeenrainingthewholeday.Ican'tevenfindanhourtoplayoutside.A.offandonB.onendC.onceinawhileD.attimes

题目详情

9. ―Why are you so down my little boy?

―It has been raining        the whole day. I can't even find an hour to play outside.

   A. off and on   B. on end

   C. once in a while   D. at times

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答案和解析

9. B on end意为"连续地";off and on意为"断断续续地";once in a while意为"偶尔";at times意为"有时,不时"。