英语题目求高手解答回答最好有解释

英语题目求高手解答回答最好有解释
1 the color of the sofa should be darker to match those chairs,______?
A couldn't they
B couldn't it
C shouldn't they
D shouldn't it
2 the analysis couldn't _____on time because the date didn't come in until five hours ago.
A be completed
B be completing
C complete
D have been complete
3 I can't find the newspaper.i hope you didn't throw____
A them away
B away it
C it away
D away them
4 by the end of the long.cold winter ,everyone will be ready to get out in the fresh air because_______indoors for three months.
A will be
B will have been
C would be
D would have been
5 i have lived in beijing for ten years already.i can hardly remember the city______i grew up.
A which
B that
C where
D in where