更重要的是解题的原因（请一一写出)

更重要的是解题的原因（请一一写出)
1.This year the villagers have produced _____ rice _____ they did two years ago.
A.less;than B.as less;as C.fewer;than D.as few;as
2.Diana,together with her friends,____ Chinese in China.
A.study B.have studied C.studies D.are studying
3.-Linda,help ____ to some fruit.
-Thank you!
A.you B.yours C.yourself D.would go
4.-May I smoke here,please?
-I am afraid you _____.This is a non-smoking area.
A.can B.can't C.may D.may not
5.-Do you know the result of the competition?
-No.It ______.
A.hasn't announced B.hasn't been announced
C.didn't announce D.wasn't announced
6.-______ more about tomorrow's weather,call 121.
-Ok,I will.Thank you.
A.Know B.Knowing C .To know D.Known
7.-How about _____ charity show?
-I should say it was ____ success.
A.the;a B.the;/ C.a;a D.a;/
8.The performance _____ nearly three hours,but few people leaf the theatre early.
A.covered B.reached C.played D.lasted
9.We arrived _____ late that there were no seats left.
A.much B.too C.so D.very