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.

(Question)
Read the following article and select the best answer. Article: My grandfather was a teacher.He was the headmaster of a school for boys between the ages of thirteen and eighteen.I know that he was a kind and gentle man at heart,because when I was young (and he was old),he gave me presents and seated me on his knees,and told me stories.But I believe the boys at his school were afraid of him. At school,when he walked into a classroom full of noisy boys,those boys went red in the faces,and looked down at their shoes.If a boy brought his poor,careless work,which was not the best that boy could do,my grandfather picked up the boy's work and threw it across the room,shouting,"Do it all again,and bring it back early tomorrow morning!" If the boy was late,or if he forgot to bring the work,he had to do it again.My grandfather never forgot. He was a very different man at school,from the man I saw day by day in his own home. Question: When he received poor work,my grandfather _ . - shouted at the boy and threw his work across the room - went red in face - threw the work on the floor,and shouted across the room - threw the work at the boy
(Answer)
shouted at the boy and threw his work across the room

Ques: Read the following article and select the best answer. Article: A breathtaking trick potentially left over from our ancestors might be found in us -- the ability to sense oxygen through our skin. Amphibians, animals such as frogs that can live both on land and in water, have long been known to be capable of breathing through their skin. In fact, the first known lungless frog that breathes only through its skin was discovered recently in the rivers of Borneo. Now the same oxygen sensors found in frog skins and in the lungs of mammals have unexpectedly been discovered in the skin of mice. "No one had ever looked," explained Randall Johnson, a biologist researcher. Mice and frogs are quite distant relatives, so the fact they have these molecules in common in their skin suggests they might well be found in the skin of other mammals, such as humans. "We have no reason to think that they are not in the skin of people too," Johnson said. These molecules not only detect oxygen, but help increase levels of vital red blood cells, which carry oxygen around the body. Normal mice breathing in air that is 10 percent oxygen--a dangerously low level similar to conditions at the top of Mount Everest, and about half that of air at sea level. However, mice that had the oxygen sensor HIF-1a genetically removed from their skin failed to produce this hormone even after hours of such low oxygen. These findings, if they hold true in humans, suggest one could raise the level of oxygen circulating inside the body. This could help treat lung diseases and disorders such as anemia without injecting drugs, which make up a multibillion-dollar market, Johnson said. Athletes also often try to get more oxygen delivered to their muscles in order to improve their performance. They often do this by training at high altitudes or in low-oxygen tents. The new study suggests they might want to expose their skin as well as breathing in low-oxygen air to improve their performance. "It's hard to say what exactly might be done, however--there's a lot we don't know yet," Johnson explained. The scientists... Question: The best title of the passage may be _ . - Humans Might Sense Oxygen Through Skin - Frogs And Mice Are Distant Relatives - First Known Animal Breathes Through Skin - Great Findings Benefits Athletes A Lot
Ans: Humans Might Sense Oxygen Through Skin

Ques: Read the following article and select the best answer. Article: The One and Only Ivan [hardcover] Katherine Applegate (Author) Patricia Castelao (Illustrator) 4.6 out of 5 stars See all reviews (117 customer reviews) / Like (58) List Price: $16.99 Price: $9.34 (for total orders over 25.) Usually ships within 1 to 3 weeks. Ships from and sold by Amazon. com. Gift-wrap available. Product Details Reading level: Ages 8 and up Hardcover: 320 pages Publisher: Harper Collins Languages: English ISBN-10: 0061992254 ISBN-13: 978-0061992254 Shopping weight: 15.2 ounces (View shipping rates and policies) Book Description Release Date: January 17, 2012 Age level: 8 and up Grade Level: 3 and up Ivan is an easy-going gorilla. Living at the Exit 8 Big Top Mall and Video Arcade, he has grown accustomed to human watching him. He rarely misses his life in the jungle. Instead, Ivan thinks about TV shows he's seen and about his friends. But mostly Ivan thinks about art and how to capture the taste of a mango. Then he meets Ruby, a baby elephant, and she makes Ivan see their home--and his own art--through new eyes. When Ruby arrives, change comes with her, and it is up to Ivan to make it a change for the better. Katherine Applegate blends humor and poignancy to create Ivan's unforgettable first-person narration in a story of friendship, art and hope. Question: The book is suitable for readers who are _ . - 3-5years old - 5-7 years old - 7-8 years old - more than 8 years old
Ans:
more than 8 years old