主句过去时态until从句为什么是过去完成?偶遇一题:The doctor advised his patient not to take any violent exercise until he___completely.A.has recovered B.had recovered C.would recover D.recovered答案选的B,我不知为何?我认
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 23:42:11
xS[nP]@]BW*3$$& LDKRC*5v"ݹ+O_=8c8h\yC;휦dS4lla,yfJ~Y