Mr. Black decided to give up his farm and devoted all his time to_______those children living on the street.
We don’t have enough money .We,_______, can’t afford to buy the car.
To enjoy the scenery, Irene would rather spend long hours on the train _____ travel by air.
Professor Smith, along with his assistants, _____on the Project day and night to meet the deadline.
He met his previous teacher ________ at abroad.
Tom, ______ yourself .Did you forget the school rules?