ThanksYou的精选

问题详情： —Catherine,Ihavecleanedtheroomforyou.  —Thanks.You______it.Icouldmanageitmyself. A.needn'tdoB.needn'thavedoneC.mustn'tdoD.shouldn'thavedone【回答】B知识点：虚拟语气与情态动词题型：选择...