Youshouldhavesaidsor的精选

问题详情：—Youshouldhavesaidsorrytoyourteacherafterclass.—Imeant________，buthewastoobusyformetocutinduringtheclassbreak.A．todo B．toC．doing D．doingit【回答】B[考查省略句式。to用来代替整个不定式tosaysorryt...