题目内容
He referred to his notebook ________ whenhe gave the talk.
- A.now and then
- B.for a while
- C.here and there
- D.all over
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
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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