以下说法中，反映当代世界各国课程改革中所存在着的一些共同的发展趋势的 是( )。

多项选择题小学课外活动的特点有( )。

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The new library building （）last week.

A. was completed
B. is completed
C. completed
D. has completed

单项选择题—It's really hot today. What drinks do we have in the fridge —We have some（）.

A. noodle
B. cheese
C. sausages
D. lemonade

单项选择题—Mr Wang, must I come again on Sunday morning to clean the windows —No, you （）. I have asked others to do it.

A. don't have to
B. mustn't
C. can't
D. shouldn't