The chemistry teacher required the students___more attention ___the lab clean.A.to pay,to keep
B.to paying,to keeping C.paying,keeping D.to pay,to keeping
求详解
人气：244 ℃ 时间：2019-09-23 09:01:55
解答
D required sb.to sth.要求某人做某事 pay attention to doing 注意某件事”,对某事加以关注 to为介词用doing doing 可省略payattentiontodoing是固定词组还是什么固定的，这俩都是固定的，要记住
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