请教三道高中英语单选题啦~~麻烦进来看看~~
1.Amoderncityhasbeensetup___wasawastelandtenyearsold.
A.whatB.whichC.thatD.where
正确答案是A.请问,为什么B选项不正确?
2.It'llbethreeweeks___wetakeourexams.
A.afterB.whenC.beforeD.since
请问,C选项为何不正确?
3.whoareyougoingtohave___thisletterforyou?
A.tapeB.typedC.beentypedD.beentyping
请大家回答一下以上三道题.谢谢咯.