7、willcome;willcome17.Thebusdriveralwayssaystous,“Don'tgetoff________thebusstops.”A.whenB.whileC.untilD.if18.Youspeakinalowvoice,Danny.Pleasespeakloudly_____Icanhearyouclearly.A.thoughB.sothatC.butD.unless 19.____ you keep on trying, I really don’t mind whetheryou can come