Excellence is not difficult —simply decide right now to give it your best shot—____you will be amazed with ___ life gives you back.

The doctor said he _______ an operation yet.

Listen! Is Kate playing the piano in the room? —No. It _________ be her. She has gone to London with her parents.

The front door opened, and a man____black camein,with an umbrella in his hand.[ ]

Mr. Fat has _______ money than Mr. Thin, but he has _______ friends.