阅读短文，选择正确答案。
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 try to stop the man with the ball. If he does
not move the ball ten yards, his team kicks the ball the other team.
Each university wants its own team to win. Many thousands of people come to watch. They all shout for
their favourite team.
Young men and women come on the field to help the people shout more. They dance and jump while they
shout.
Each team plays ten or eleven games each season.
The season begins in September and ends in November. If a team is very good, it may play another game
after the season ends. The best teams play again on January 1, the first day of the New Year. Many people go
to see these games and many others watch them on TV.
1. The passage talks about ________. [ ]
A. football
B. how to play football
C. American sports
D. American football
2. We can _______ the football in both American football and Chinese football. [ ]
A. kick
B. throw
C. run with
D. catch
3. Why is it difficult to move the ball? Because ________.
A. ten yards is a long way
B. many men on the other team try not to let the ball come near
C. the playing field is very large
D. eleven men have to catch the ball one by one
4. If they ________, the teams will play on January 1. [ ]
A. receive six points
B. play eleven games in the season
C. are the best teams
D. move the ball to the end of the field
5. Many people come to watch football and they want their team to win. Which of the following is not their act? [ ]
A. Jumping.
B. Dancing.
C. Crying.
D. Shouting.
的相邻同系物 
，式中—C6H5是苯基。这三种单体的结构简式分别