We should never ____till tomorrow what we can do today.

Where ___________ your pen pals from? — The United States.

He _______ morning exercises yesterday.

Many teenagers show interest in the books that are written ________ Guo Jingming.—That’s true. My son says he can get what he thinks and wants in his books.[ ]

Rather than ____ in the restaurant many westerners prefer to get together with friends for weekends.