Hereferredtohisnotebook________

发布时间：2020-07-28 02:15:40

He referred to his notebook ________ whenhe gave the talk.A.now and thenB.for a whileC.here and thereD.all over

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A解析now and then 时不时for a while 一段时间 here and there 到处all over 到处，遍及
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