Weshouldh的精选

问题详情：—Guys,Iwasreallywornout!Ican'twalkanyfurther!—Weshouldhavearest.We________thecaveawholeday.A.exploring B.areexploring  C.havebeenexploring  D.explore【回答】C知识点：动词时态与语态题型：选...