ThanksYou的精選

問題詳情： —Catherine,Ihavecleanedtheroomforyou.  —Thanks.You______it.Icouldmanageitmyself. A.needn'tdoB.needn'thavedoneC.mustn'tdoD.shouldn'thavedone【回答】B知識點：虛擬語氣與情態動詞題型：選擇...