题目

阅读理解 In almost every big university（大学）in the United States, football is a favourite sport. American football is different. Players sometimes kick the ball, but they also throw the ball and run with it. They try to take it to the other end of the field. They have four chances（机会）to move the ball ten yards（码）. They can carry it or they can throw it. If they move the ball ten yards, they can try to move it another ten yards. If they move it to the end of the field, they receive six points（点. It is difficult to move the ball. Eleven men on the other team 在括号里填上 “﹥”、“﹤”或“﹦”17（____）20 17-8（____）6 12-5（____）7+8 13-2（____）2+95（____）15 14（____）9＋9 13－9（____）3＋1 7＋6（____）13＋1