[来源:]Ⅰ.单项填空1.Professor James will give us a lecture on the Western culture,but when and where ________ yet.A.hasn't been decidedB.haven't decidedC.isn't being decidedD.aren't decided 解析:本题考查动词的时态与语态。由yet可看出用完成时,又因时间与地点是被决定的,故应用被动语态。答案:A2.(2012年北京海淀区模拟)The headmaster ________ all the teachers not smoke in the office.A.told B.announcedC.called D.demanded解析:因为题..