_____ some teenagers don’t realize is ____ difficult life can be after they get addicted to drugs.
—What do you think of the hotel here?—Oh, wonderful! We ____ a better one than this.
We are all looking forward ______ the Great Wall during the National Day.
_________ production up by 60%, the company has had another excellent year.
They are talking so warmly and it looks _________ they had been old friends.
I am busy now. _________ my brother do it for you?