我国学校德育主要内容有( )。

多项选择题以目的和目标的概括程度为依据，教育可以分为哪几种目的层次( )

单项选择题— Sorry, do you mind if I smoke here —Yes,（）.

A. you could
B. go ahead
C. I do
D. my pleasure

单项选择题It's the first time that he has been to Australia, （）

A. isn't he
B. hasn't he
C. isn't it
D. hasn't it

单项选择题Peter's jacket looked just the same as Jack's, but it cost （）his.

A. as much twice as
B. twice as much as
C. much as twice as
D. as twice much as

单项选择题Children need friends （）their own age to play with.

A. of
B. for
C. in
D. at