It is only when an NBA player has been through many battles _______he learns an important lesson: there is no "I" in "team".
It is reported that the United States uses _____ energy as the whole Europe.
In peace, too,the Red Cross is expected to send help _____ there is human suffering.
Mr. Smith has bought a new house in the country, around _____ some green trees.
I'd like to have visited the Palace Museum last week, but something unexpected _____to my father.
—What are you busy with?—The conference _____in our city next week, as you know.