Old people shouldn’t       . In fact, they have stronger and clearer minds.

— Jenny, I need some milk?—Ok, Mum.______do you need?

 —I’m worried about the coming test. —You should work hard for it,_____you’ll have to take it again.

There _____ a number of people at the square in the morning, the number _____ over 1,000.

I don’t know        to do it, so I want to ask the teacher for        advice.