Asthemid-examinationiscoming,thestudentsarebusy____it.A.preparingB.prep

发布时间：2020-08-04 08:09:33

As the mid- examination is ing , the students are busy ____ it.A.preparingB.prepare forC.prepareD.prepareing for

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B解析此题考查固定短语be busy doing sth表示忙于做某事；prepare for sth表示为…做准备。
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