52The struggle against sand storm will not end _____ victory unless we pay much attention to the balance of nature

_____you sing and dance at this late hour of the night?-Sorry, I will stop right now.

You can sing along this kind of music.

He is known everybody in our town a gentleman.

It worries the parents a lot that their only daughter doesn’t study hard as she ______and is not so active as she ______. [ ]