【2道高中英语语法题】
1.Thesignonthelawnsaysclearlythatpeople_______onthegrass.
A.willnotwalkB.mightnotwalkC.havenottalkedD.maynotwalk
2.Heoncestudiedatoneofthemostfamousuniversities_______hedoesn’tidentified.
A.whereB.whoC.whomD.which
请问为什么?