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He referred to his notebook whenhe gave the talk.A.now and thenB.for a whileC.he

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He referred to his notebook whenhe gave the talk.A.now and thenB.for a whileC.he

He referred to his notebook ________ whenhe gave the talk.

A.now and then

B.for a while

C.here and there

D.all over

试题答案

A

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