May I have a cat at home, Dad—Yes, you can. But you must know how to ____________ it.

John opened the door. There _____ he had never seen before.[ ]

The doctors are the patient for his broken arm with a new drug.[ ]

Don’t eat ______sweet food, oryou’ll be ______fat.

Everything will be all right. We must never stop taking a(n) ________ attitude towards life.