1.the girl looked at me with a mixture of amusement and despair,so i felt a little puzzled.中mixture中为什么不可以用mix,mix也有名词呀.

1.the girl looked at me with a mixture of amusement and despair,so i felt a little puzzled.中mixture中为什么不可以用mix,mix也有名词呀.mix和mixture有什么区别
2.---Do you know__A__ Mr.Black's address is?
---He may live at No.18 or No.19 of Green Street.I'm not sure of____.
A.what; whichB.where; which
C.where; whatD.what; where
为什么不是D
3.--would you tell me_D___ you want our tea,with sugar
or milk?
--sugar,please.
A/ BWhenever C what D when
为什么是D
4.I remember____this used to be a quite village
A When B how C where D what