Sitting on a chair all day in school can make anyone want to move around. So, more and more teachers are letting students have a ball. By sitting on exercise balls instead of chairs, teachers find students' posture (姿势) and attention improve.
Dottie Pownall, a fifth-grade teacher in West Virginia, USA, has been using balls as chairs since December 2008. "The students love them", she says. Pownall took a survey of her students. She found that 80% of the students thought sitting on the balls helped them pay more attention to what they were learning.
The teacher, Pisa Witt, felt so strongly about the use of balls as chairs, she started Witt Fitt. This company encourages the use of the balls. And the company educates not only teachers but also students on how to use them. "Our products are used in 24 states, three provinces in Canada, Puerto Rico ('波多黎各) and Japan," says Witt. "Research shows that sitting on the balls makes them sit up straighter. You can slouch (低头垂肩地坐) on a ball," says Witt, "but it feels awful." Because the students are moving, their blood (血液) increases. That carries more oxygen (氧气 to the brain (大脑), so the kids have more energy and can focus longer.
"Furthermore, they're fun." says Pownali.
【小题1】 What will happen if a student sits on a chair all day in school? The student will _________.

When he was a boy，science________Edison very much．

1. A.
   interest
2. B.
   interesting
3. C.
   interested
4. D.
   interests

完形填空 分别通读下面两篇短文，根据短文内容，从A、B、C三个选项中选出可以填入空白处的最佳答案。（共20小题，每小题1分；计20分）
The word “sandwich” is an English word. Sandwich was an English   1 . He lived in England about two hundred years ago. Sandwich had a lot of   2 . He was very rich(富有的). But he liked   3  cards for money. He often played   4  day and night.   5  day he played for twenty-four hours without stopping. He did not   6  the card table to eat. He asked his man to   7  him some meat and   8 . So he put some meat between two pieces of bread. He did not want to stop   9   playing cards. From the name of this man, Sandwich, we have the word “sandwich”   10 .
【小题1】A．woman               B．man                 C．book
【小题2】A．money               B．food                C．cards
【小题3】A．making              B．keeping              C．playing
【小题4】A．every              B．only                C．all
【小题5】A．One              B．Next                C．This
【小题6】A．hold                B．leave                C．show
【小题7】A．use                 B．take                 C．bring
【小题8】A．milk                B．fruit                C．bread
【小题9】A．before              B．when                C．after
【小题10】A．in shops           B．this year            C．today