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 (姿勢(shì)) 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 (低頭垂肩地坐) on a ball," says Witt, "but it feels awful." Because the students are moving, their blood (血液) increases. That carries more oxygen (氧氣 to the brain (大腦), so the kids have more energy and can focus longer.
"Furthermore, they're fun." says Pownali.
【小題1】 What will happen if a student sits on a chair all day in school? The student will _________.
A．pay more attention to his lessons B．be fun
C．like to move aroundD．sit up straighter
【小題2】 How long has Dottie Pownall used the balls?
A．About three years. B．Only one year.
C．In 2008. D．Since he was a fifth-grade teacher.
【小題3】 In how many countries are the balls used as the students' chairs?
A．Four. B．Three. C．Two. D．One.
【小題4】Teachers choose balls instead of chairs because sitting on balls helps the kids___________.
A．improve the students' posture and attentionB．slouch on the chairs
C．have funD．Both A and C are correct answers.
【小題5】Which is better for kids to study in class, sitting on a chair or sitting on a ball?
A．Sitting on a chair.B．Sitting on a ball.
C．They are the same.D．We don't know.

【小題1】C
【小題1】A
【小題1】A
【小題1】D
【小題1】B解析:
【主旨大意】本文是一篇議論文。通過學(xué)生們坐在球上學(xué)習(xí)的積極作用論證了這一做法的有效性和實(shí)用性。
【小題1】由第一句話Sitting on a chair all day in school can make anyone want to move around.“在學(xué)校里坐在椅子上太久了就想四處走動(dòng)一下�！� 可知答案選C。
【小題1】根據(jù)第二段第一句中的 since December 2008“自從2008年12月份起”可知到現(xiàn)在大約三年了，故答案選A。
【小題1】通讀全文可知這種balls在文中在這四個(gè)國家應(yīng)用：USA, Canada, Puerto Rico ('波多黎各) and Japan，故答案是A。 
【小題1】 由第一段的最后一句和最后一段的最后一句可知這種球的功效，故答案選D。
【小題1】通讀全文可知本文講的是坐在球上學(xué)習(xí)的好處，故答案B正和此意，所以答案選B。
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