几道英语小问题,请高手指教,并做一些简单说明21.Theplanetsaresofarawaythatitisimpossible____inmiles.A.thatwemeasureitB.toustomeasurethemC.forustomeasurethemD.measuringthem22.Onlybydiligenceandhonesty_

　　几道英语小问题,请高手指教,并做一些简单说明

　　21.Theplanetsaresofarawaythatitisimpossible____inmiles.

　　A.thatwemeasureit

　　B.toustomeasurethem

　　C.forustomeasurethem

　　D.measuringthem

　　22.Onlybydiligenceandhonesty____.

　　A.onecansucceedinlife

　　B.canonesucceedinlife

　　C.onecanbesucceededinlife

　　D.canonebesucceededinlife

　　23.You____yesterdayifyouwerereallyseriousaboutthejob.

　　A.oughttocome

　　B.oughttohavecome

　　C.oughthavecome

　　D.oughtcome

　　24.Thesearecommonmaterials____weareallfamiliar.

　　A.aboutwhich

　　B.ofwhich

　　C.withwhich

　　D.towhich

　　25.Ifthewholeprogram____beforehand,agreatdealoftimeandmoneywouldhavebeenlost.

　　A.wasnotplanned

　　B.werenotplanned

　　C.wouldnotbeplanned

　　D.hadnotbeenplanned