AI,together with his two friends,_____to Beijing for a holiday this summer.

AI,together with his two friends,_____to Beijing for a holiday this summer.
A.are going B.was going C.will be going D.is going
为什么不选B
2.Nick didn't do very_____in the final exam,but his scores are ____than last year's.
A.good,better B.bad,worse C.well,worse D.well,better
为什么不选A
3.Father often ____me____his computer.
A.tells,use B.ask,to use C.made,to use D.let,use
为什么不选B
4.As I'm the only child in the family,my parents give me most of the things____I ask for.
A.that B.what C.which D.when
为什么不选B
Peter ____in the library because I met him in the street a minute ago.
A.can't be B.can be C.mustn't be D.must be
为什么选A
We are sure that computer will____humans in many fields soon.
A.take the place B.take the place of C.take place D.instead of
答案为什么选B不选D
(以上都要说明选正确答案的理由）