We are faced with the problem _________ we should do with so much pollution.
Professor Lee is considering going to teach in Shenzhen, where he can get paid .
— Excuse me.Is this the right way to the Summer Palace? — Sorry, I am not sure.But it______be.
— Do you want tea or coffee? — ______.I really don’t mind.
Finally they arrived at a place _____ sold cigarettes and some other bargains.
Don’t be worried about his safety.______, he is an eighteen-year-old young man.