问题描述：
4道高中英语题
1.Doyoumind_______?”“Goahead.”
A.turningonthefanB.ifIturnonthefan
2.Theystillrememberedtheyears_______togetherinthecountry.
A.whentheyB.whichspentC.spenthappilyD.theyhadfor
3.Iwas_____himlastWednesdaybuthedidn’tcome.
A.abouttoseeB.abouttohaveseenC.tohaveseen
4._____mapdatedbacktoabout3000B.C.
A.TheoldestknownB.Knownastheoldest
C.ItwastheoldestknownD.Knowntobetheoldest
请大家告诉我为什么别的不能选,谢啦!