Thisexerciserequires________carefull

发布时间：2020-07-10 00:15:22

This exercise requires ________ carefully. We should do as we are required ________.













A.to do; doing












B.to be done; doing











C.to be done; to doing











D.doing; to do

网友回答

D
以上问题属网友观点，不代表本站立场，仅供参考！