Read the following article and select the best answer. Article: 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 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 and Japan," says Witt, " Research shows that sitting on the balls makes them sit up straighter . You can slouch on a ball," says Witt, "but it feels bad." Because the students are moving, their blood increases. That carries more oxygen( ) to the brain , so the kids have more energy and can pay attention longer. "Besides, they're fun." says Pownall. Question: How long has Dottie Pownall used the balls? - About four years. - Only one year. - In 2008. - Since he was a fifth-grade teacher.
About four years.

Read the following article and select the best answer. Article: When I was growing up in America, I was ashamed of my mother's Chinese English. Because of her English, she was often treated unfairly. People in department stores, at banks, and at restaurants did not take her seriously ,did not give her good service ,pretended not to understand her ,or even acted as if they did not hear her .W _ w w.k*s*5 u.c@o m My mother has realized the limitations of her English as well. When I was fifteen, she used to have me call people on phone to pretend I was she . I was forced to ask for information or even to yell at people who had been rude to her. One time I had to call her stockbroker .I said in an adolescent voice that was not very convincing, "This is Mrs.Tan.." And my mother was standing beside me ,whispering loudly, "Why he don't send me cheek already two week late." And then , in perfect English I said : "I'm getting rather concerned .You agreed to send the check two weeks ago, but it hasn't arrived." Then she talked more loudly. "What he want? I come to New York tell him front of his boss." And so I turned to the stockbroker again, "I can't tolerate any more excuse. If I don't receive the check immediately , I am going to have to speak to your manager when I am in New York next week." The next week we ended up in New York. While I was sitting there red-faced, my mother, the real Mrs.Tan, was shouting to his boss in her broken English. When I was a teenager, my mother's broken English embarrassed me. But now, I see it differently. To me, my mother's English is perfectly clear, perfectly natural. It is my mother tongue. Her language, as I hear it, is vivid, direct, and full of observation and wisdom. It was the language that helped shape the way I saw things, expressed ideas, and made sense of the world. Question: After the author made the phone call, _ . - they forgave the stockbroker - they went to New York immediately - they failed to get the check - they spoke to their boss at once
they failed to get the check

Read the following article and select the best answer. Article: Warm water freezes more quickly than cold water. Sir Francis Bacon said that almost four hundred years ago. But few people believed him until 1970. In that year Canadian scientist Geoge Kell proved the English physicist was right. Dr Kell filled one open bowl with cold water. He filled another with warm water. He put both bowls to the same low temperature. The warm water froze first. The lack of covers on the bowls was the secret . Some of the warm water changed into vapor. It evaporated into the air. This meant that less of the warm water was left to freeze. And so the warm water froze faster than the cold water. Question: Warm vapor can't freeze faster if the bowls are _ . - full - covered - put outside - changed
covered

Read the following article and select the best answer. Article: Internet dating has become one of the biggest and most successful business ventures on the Internet.Basically,Internet dating is a way to meet people for either friendship or dating without actually having to meet them in person first. The first thing to do if you decide to try Internet dating is to build your profile which can include your hobbies,hopes for the future,and so on.A photograph is optional,but many sites claim that a photograph increases the number of people who look at your profile. Many Internet dating sites will charge a one-time registration fee to use their services. Internet dating makes it possible to meet people from all over the world. You call even narrow the search down to your area by zip code.Another advantage is that you can communicate by email before you meet in person.Thousands of people have met,fallen in love,and married through Internet dating.It is an excellent way for shy people to meet.It is also a way for people with busy lives to connect with others,and an easy way to meet people who share your interests. Just as in conventional dating and love,there are some pitfalls to be aware of in Internet dating.The person you have been talking to on the net may not be who they say they are. Be very aware that there are some people who misrepresent their appearance or private details,such as marital status,income,and so on,for their own reasons.It would not be the first time that someone has been taken in, and talk shows are full of cheating partners who have been caught dating over the Internet in their spare time.Nevertheless,taking a few simple precautions should help ensure that your Internet dating experience is fun. Question: The purpose of writing the passage is to _ . - persuade readers to go dating on the Internet - inform us how to date on the Internet - warn readers against web love - introduce Internet dating to us
introduce Internet dating to us