问题描述：
TheRomanpeopleoriginallylivedinnorthwestIndiain＿isnowsoutheasternPakistan.A.whatB.which.Cthat.Dwhere(我知道是宾语从句且充当从句主语,那为什么只能是what不能是whichwhich也可以引导宾语从句啊!而且它不可以充当主语吗?)2.＿onthetopofthehillisamonument,datingbacktohundredsofyearsago.A.havingstood.B.StandingC.beingstood.Dhavingbeenstood3.Thesplitbetweenhumanandlivingapesisthoughtbysomescholars＿15to20millionyearsago.A.tohaveoccurred.B.havingoccurred.C.tooccurD.occurring
