Thechemistryteacherrequiredthestudentsmoreattentionthelabclean.A.topay,tokeepB.topaying,tokeepingC.paying,keepingD.topay,tokeeping求详解

Question

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

Answer 1

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