请教几道初三英语选择题
1.是anuniversity还是a
2.—Look!She’sskiingsofast!
—Itishardto(realize/imagine/know)herlegwereoncebroken.
3.Iwonder(howmuchthesebookcost/whatthepriceofthemis).
4.Kate,withherparents(hasgone/havegone).
5.Theoperationonhisleg(lasted/spent/cost/included)onehour.
给出理由谢谢