蛮难的,请各位大侠能给我个好的解释,万谢!1.Wehavebuilta"GreatGreenWall'thenorthenpartofChinaA.crossB.crossedCiscrossingDacross答案是across我想问crossed为什么不行?2.Who'sgoingtogiveusatalkat

Question

蛮难的,请各位大侠能给我个好的解释,万谢!
1.We have built a "Great Green Wall' _____ the northen part of China
A.cross B.crossed C is crossing D across
答案是across 我想问 crossed 为什么不行?
2.Who's going to give us a talk at the meeting
A.Mr King is B.That's Mr King C.It's Mr King
我想问C为什么不行?
3.What did you see ,Mary?
I saw a lot of beautiful flowers on _______ of the lake
A.either side B.both sides C all sides
我想问A为什么不行?
4.Have you got ___ E-mail address?
Yes.It's rggren@hotmail .com
A the B an
为什么不能选A?
5.I've got ___ information from all the computer now.
A.an B.the C./
请问B为什么不行?

Answer 1

1.across是prep（介词）.穿过；横穿adv（副词）.横过；在对面.crossed 是动词,过去式.这个空要的是介词,与some space in china 的in 同属介词,表方位.
2.C是电话问答方式,这题很明显是公共对话.
3.either side 是一边,lake不是道路是湖啊,A在只在道路的模式下可用,在这里不能用.
4.the是特指,an是泛指.如果这个网址的具体内容被提出来了,就用the,这里只是问随意的一个网址,故用an.
5.information是不可数名词,没有指代含义的用法,the没有和information的搭.