英语语法问题1.He deserved ________ the prize for writing such an a

英语语法问题
1.He deserved ________ the prize for writing such an amazing short story.I don’t understand his not receiving the award.
A.winning B.having won
C.to win D.to have won
2.There she spent her days in a bare,gray-walled room lined ________ small boxes,where the orphans kept whatever playthings they had.
A.by B.with
C.for D.over
3.Parents should learn to explain their feelings to the child so that the child can realize the ________ of his or her behaviour on them.
A.importance B.impact
4.People were ________ when the boy said that the kangaroo,resting on its hind legs and its large tail,had five legs.
A.amused B.puzzled
5.Intellectual-property experts are trying to ________ new models that will allow the film industry to survive downloading.
A.come up with B.come across
C.come out of D.come upon
选哪个为什么说明原因.