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' attention improved. The most important thing is that it's very interesting and exciting.

    Peter, a fifth-grade teacher in West Virginia, the USA, has been using balls as chairs since December 2010."The students love them, "he says. Peter took a survey of his students. He found that 80% of the students thought sitting on the balls helped them pay more attention to what they were learning. They can focus on what they have learned.

    The manager, Mary, feels so strong about the use of balls as chairs, and she encourages the use of the balls. She hopes not only teachers but also students know how to use them. "Our products are used in 24 states, three provinces in Canada, Puerto Rico and Japan," says Mary. "Research shows that sitting on the balls makes them sit up straighter," says Mary, "but it feels not boring." Because the students are moving, it makes their blood flow faster. That carries more oxygen to the brain, so the kids have more energy and can focus longer. "Besides, they're fun," says Peter.

—Why not ask them to have it         ?

The plane arrived at the airport  .

He has helped many poor people      Jack.

The policethe areaclues.

    Before Father's Day, I found my father was unhappy because he was out of work. I decided to cheer him up by buying him a special Father's Day gift.

    One day after school I1to the Agins which was known for fashions and styles. I told the Agins salesperson that I was looking for a Father's Day present.

    "Do you think he'd like a2?" she asked. "Yes, I think he might, "I told her.

    She 3 a Swiss watch and I told her that he would like it.

    "How much money do you have?" she asked.

    "4dollars, "I replied.

    "You're so lucky!" she told me." It's only $11.You still have $l for the 5." She packed the watch and I thanked for my business, and I rode off home with the gift under my arm.

    When my father opened the gift, he asked 6, "Where did you get it?"

    "I bought it at the Agins. It cost me $11, "I said. My father was shocked into silence.

    Many years later, I did learn that the watch was worth several hundred dollars, 7I appreciated(感激)how wonderful the Agins sales-person had been to me. I always felt8that I never had a chance to thank her.

    "What really amazes me to this day...…my daughter, "my father said." Letting you have the watch for 11 dollars was 9 enough. But the fact that she let you leave the shop with a dollar for the card was a touch (触动)of 10.I'll never forget it."