希望英语好手帮我解决几道题
我们老师叫讲题,但本人(高中)英语差.希望大家能帮我.要求:1、先翻译一下2、答案是哪个,为什么是这个,其他的为啥不对3、本题出现的重要知识点题:1、()shehadtimetorealizewhatwashappening,shewashitonthehead.A.SinceB.BeforeC.WhenD.Until2、Studyingalone,youarefreetochoosewhattolearnandwhen,()youdon'tneedothers'agreement.A、whileB、ifC、thoughD、as3、-Mum,whereismylunchpack?-Just()itwas.A、whereB、whatC、whichD、how4、Manycollegestudentsseethevacationasagoodopportunitytogainsocialexperience()theycanhavemoreadvantagesinthefuturejobmarket.A、sothatB、incaseC、evenifD、inthat5、Thefirewasfinallybroughtundercontrol,butnot()heavydamagehadbeencaused.A、beforeB、afterC、sinceD、as6、Youcanmakeacomplainttothelocalgovernment()youarehappywiththewaythingsare.A、unlessB、ifC、onceD、as7、Johnknockedatthedoorfornearlyfiveminutes()hiswifeopenedit.A、whenB、beforeC、untilD、while