1.-()doyouthinkisthebestrestaurant?-TheoneonBridgeStreet.A.WhoB.WhereC.WhatD.How2.Don'tthrowwastepapereverywhere.It'sourdutytokeepourschool()A.cleanBcleanedCcleaning3.Withthehelpofcomputerspeoplewillfinditeasi

Question

1.-( )do you think is the best restaurant?
- The one on Bridge Street.
A.Who B.Where C.What D.How
2.Don't throw waste paper everywhere .It's our duty to keep our school ( )
A.clean B cleaned C cleaning
3.With the help of computers people will find it easier to keep the traffic ( ) smoothly.
A to run B run C running
4.Isn't Kang Kang back yet
No,but I think he will return ( ) an hour .
A for B in C after
5.If the postman has a registered letter for us ,he ( ) it to our flat.
A brings B send C leaves D take
请把3 4 题帮我对比下，以及“Isn't Kang Kang back yet ”的句型含义！其余的解析希望能具体一些！

Answer 1

1.A.what表什么样的旅馆是最好的,如果有which 那最好.表示是哪家旅馆.
2.A.keep sth +形容词 表示让...保持...状态.所以这里cleaned 和cleaning 都不行.当然我们也见过keep sb doing 的形式,但意义不一样了啊.
3.C.同上面2所说的另外一个句型keep...doing.使什么一直保持什么状态.行为动作用doing,状态用形容词.
4.B.in+ 一段时间 表示将来的时间状语,多久之后动作才发生.for表示多长时间 多用于现在完成时.after 一般不接一段时间词,接时间点的词,表示在...后,多用于过去时,将来时.
yet 一般是与现在完成时连用,多用于否定和疑问句中,表示还没有.加强语气的作用.be+ 形容词也可与它连用,于完成时同.
5.B.强调送达 send...to...结构常用.bring和take是常用词,意义不同在于,一个是带来,一个是带走,相对于说话人现在的位置所说的.