–Why do you choose to work in an international travel agency?-- Well, you know, English is my _______. So it is my best choice.
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.
Do you really want to borrow the old room which is empty _____a broken desk and a chair?