He gained ___ wealth by printing ___ works of famous writers.
Beijing was attacked by such a terrible sandstorm ______few citizens had ever experienced before.
He______ on this paper for ten minutes but he______only about sixty words.
Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.
You can’t guess ______ when he was admitted by Beijing University.
As teachers, we feel______our duty to teach our children to be good wherever we are.