What a _____ boy! I don’t know what to do with him.
I first met Mr Smith in America. He ________ at Stanford University then.
The book isn't intended for general readers probably because the author _______ too many scientific terms(术语) in it.
---- What does P.O._________?----Poster order, I guess.
It was not until dark __________ he found __________he thought was the correct way to solve the problem.
It is reported that the United States uses ________ energy as the whole of Europe.