_____in the sports world,a sportsman needs to train constantly to keep himself in best condition.
Would it be ________ for you to pick me up at four o’clock and take me to the airport?
— Sorry, I have to ________ now. It’s time for class. — OK, I’ll call back later.
You’d better ________ your coins, and see how long you can last.
________, what she had devoted herself to resulted in nothing but failure.
I turned back only to find an old schoolmate whose name ______ me for the moment.