Article: Mandara seemed to know something big was about to happen. So she let out a yell, caught hold of her 2-year-old daughter Kibibi and climbed up into a tree. She lives at the National Zoo in Washington, D.C. And on Tuesday, August 23rd, witnesses say she seemed to sense the big earthquake that shook much of the East Coast before any humans knew what was going on. And she's not the only one. In the moments before the quake, an orangutan let out a loud call and then climbed to the top of her shelter. "It's very different from their normal call," said Brandie Smith, the zookeeper. "The lemurs (monkey-like animals of Madagascar) will sound an alarm call if they see or hear something highly unusual." But you can't see or hear an earthquake 15 minutes before it happens, can you? Maybe you can -- if you're an animal. "Animals can hear above and below our range of hearing," said Brandie Smith. "That's part of their special abilities. They're more sensitive to the environment, which is how they survive." Primates weren't the only animals that seemed to sense the quake before it happened. One of the elephants made a warning sound. And a huge lizard ran quickly for _ . The flamingoes (a kind of bird) gathered before the quake and stayed together until the shaking stopped. So what kind of vibrations were the animals picking up in the moments before the quake? Scientist Susan Hough says earthquakes produce two types of waves -- a weak "P" wave and then a much stronger "S" wave. The "P" stands for "primary". And the "S" stands for "secondary". She said she thinks the "P" wave might be what set the animals off. Not all the animals behaved unusually before the quake. For example, Smith says the zoo's giant pandas didn't jump up until the shaking actually began. But many of the other animals seemed to know something was coming before it happened. "I'm not surprised at all," Smith said. Question: According to Brandie Smith, _ . Yes or no, is the answer "many animals' hearing is sharp"?
No

Article: Are you carrying too much on your back to school? I'm sure lots of your age will say "Yes". Not only the students in China have this problem, but children in the United States also have heavy school bags. Doctors are starting to worry about that younger and younger students are having problems as a result of school bags being too heavy for them. "It's hard for me to go upstairs with my bag because it's so heavy," said Rich Hammond, an 11-year-old student in the US. Rich is among students who have common school bags with two straps to carry them, but many other choose rolling bags. But even with rolling bags, getting up stairs and houses is still a problem for children. Many of them have hurt backs and necks because of the heavy school bags. But how much is too much? Doctors say students should carry no more than 10% to 15% of their own body weight. Scott Bautch, a black doctor, said children under Grade 4 should stay with 10%. But it is also important that older children don't stay with over 15%, because their bodies are still growing. "Children are losing their balance and falling down with their school bags," he said. Parents and teachers are starting to tell children to only take home library books that they will be reading at night. Some teachers are using pieces of paper or thin workbooks for students to take home. One of the best answers is, as some children said, to have no homework at all. Question: According to the doctor, Scott Bautch, if a child in Grade 5 weigh about 30 kilos, the school bag he carries should not be over _ . Yes or no, is the answer "4.5 kilos"?
Yes

Q: Article: During the last twenty years there has been increasing concern with the quality of the environment. Along with air and water pollutions, noises pollution has been recognized as a serious pollutant. As noise levels have risen, the effects of noise have become more apparent. Noise is defined as "unwanted sound". Causes of noise pollution include traffic, aircraft, rock bands, barking dogs, televisions, garbage trucks, and noise from neighbors, voices, alarms, and watercrafts. Studies show that over forty percent of Americans are disturbed at home or lose sleep because of noise pollution. Noise has bad effects on people and the environment. Noise causes hearing loss, interferes with human activities at home and work, and is in various ways dangerous to people's health and well being. When we think, talk, listen to music, or sleep, we need quiet. Even low levels of noise can be annoying or frustrating. Sudden increases in volume can make sounds annoying. The quieter the background is, the more _ a noise can be. Noise can also make instructions or warning unclear, resulting in accidents. Louder noise bursts can be more disruptive .Continued stress can lead to high blood pressure, which is the major cause of some diseases. Long exposure to noise levels above eight-five decibels can damage inner cells and lead to hearing loss. Noise can result in the involuntary fear response and can cause adrenaline to be pumped into the bloodstream, the heart rate to quicken, muscles to tense, breathing to increase, and the digestive system to slow down. Local government has the responsibility to fight noise pollution. For example, it can regulate the speed of trains through their community. On the other hand, a responsible citizen will never make noise pollution wherever he is. Question: According to the text, noise pollution may be caused by _ . Yes or no, is the answer "vehicles and animals"?
A: No

*Question*
Article: People use their mouths for many things.They eat, talk, shout and sing. They smile and they kiss. In English language ,there are many expressions using the word "mouth".Foe example, If you say bad things about a person, the person might protest and say " Don't bad mouth me." Sometimes ,people say something to a friend or family member that they later regret because it hurts that person's feelings.Or they tell the person something they were not supposed to tell. The speaker might say: "I really put my foot in my mouth this time." If this should happen, the speaker might feel down in the mouth. In other words , he might fell sad for saying the wrong thing. Another situation is when someone falsely claims another person said something.The other person might protest: "I did not say that .Non't put words in my mouth." Some people have lots of money because they were born into a very rich family. There is an expression for this, too. Ypu might say such a person, " was born with a silver spoon in his mouth." This rich person is the opposite who lives from hand to mouth. This person is verry poor and only has enough money for the most important things in life ,like food. Parents might sometimes withold sweet food from a child as a form of punishment for saying bad things.For example,if a child says things she should not say to her parents, she might be described as a mouthy child.The parents might even tell the child to "stop mouthing off." But enough of all this talk.I have been "running my mouth long enough." Question: If a person lives from hand to mouth, it implies _ . Yes or no, is the answer "he is badly-off"?
**Answer**
No