There is some doubt ____ the sick schoolboy can join in the English evening party on Sunday.

_________you’ve known the importance of it, you should try your best to do it.

I’ll help you _______ I don’t sleep for night.

Who was it _______ wanted to see me just now?

Do you think the reason _______ he gave is believable?

— How are you getting on with your work? 
— Oh, I’m sorry. Things aren’t going so well as _______.

In the past few years, he has collected a lot of ancient coins, _______ date back to the Ming and Qing Dynasties.

—Bread ______ butter? 
— Bread ______no butter. thank you.

You will have to stay at home all day ______ you finish all your homework.

Recently a new social issue has been brought to everyone’s attention ___  __food additives are abused．