John, you must get your room ________ after breakfast. 

 —I' m sorry, but I didn’t mean__________ out your secret.—But you know, letting out one's secret means________ one' s feelings.

Friends are like leaves, ________ everywhere, but true friends are like diamonds, precious and rare.

_______ basic first-aid techniques will help you respond quickly to emergencies.

To play fair is as important as ______.