–Hi,Li hua!I have two tickets for Shang Weijie’s concert tomorrow.-Really? But I’m busy now. _____I be free , I'd like to go very much .
Only the factory ____ yesterday ____ this kind of machines.
The boy is often found _____in reading books.
Nowadays no one can ignore the power of____, because they can expose the truth to the public so as to solve the problems.
A person who believes that he is incapable will not make a real __________, because he feels that it would be useless.
I want to leave now; I can’t ____ nothing useful here.