好课件网>英语>ield. They have four chances to move the ball ten yards. They can carry it or throw it. If they move it to the end of the field

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ield. They have four chances to move the ball ten yards. They can carry it or throw it. If they move it to the end of the field

they receive six points. This is called a touch—down. It is difficult to move the ball. Eleven men on the team try to stop the man who has the ball. If the man does not move the ball ten yards
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