*Question*
Read the article and select the best answer. Article: Can you remember a morning when you've woken up to the ring of your alarm clock and wished you could stay in bed? You haven't slept well, your hair is a mess. Worse, you can't stop yawning. Yawning is universal to humans and many animals. Cats, dogs and fish yawn just like humans do! Yawning is an involuntary(,) action during which you open your mouth and breathe deeply. The average duration of a yawn is about 6 seconds. The purpose and cause of yawning are still a mystery. Scientists are not sure what causes a yawn. People yawn when they are tired or bored, but they also yawn when they aren't. There are many ideas explaining why we yawn. One idea is that yawning is a way for the body to become more alert by taking in more oxygen. A yawn increases the heart rate, forces carbon dioxide out of the lungs and blood stream, and brings oxygen to the brain. But one study showed that volunteers given a lot of oxygen did not yawn any less than before, while those given a lot of carbon dioxide did not yawn more. Another idea is that early humans used yawning as a form of communication. If one decided it was time to sleep, they would tell the others by yawning and they would do it in return to show they agreed. A third explanation comes from psychology professor Gordon Gallup of University at Albany in New York. He said that as people yawn, they cool off their brains. "Brains are like computers." he said. "They only operate efficiently and effectively when they're cool. Many things connected to yawning, like being tired, make the brain hot, and yawning can reduce the heat." Scientists have sent people into space, and created terrible nuclear weapons, but there are lots of seemingly simple things, such as why we yawn, or hiccup , that they can't figure out. Next time you are in class in the morning, let out a big yawn and watch to see how many of your classmates yawn in response! Question: What's the purpose of the description of how bad you may feel when you're woken up in the morning? Options: A: To explain why humans yawn. B: To explain how humans start yawning. C: To lead into the topic of yawning. D: To complain about being woken up by the clock.
**Answer**
C

*Question*
Read the article and select the best answer. Article: Travel is exciting and summer is a busy period for holiday travel. Many people will travel great distances in airplanes, cars or other vehicles. Experts say people should know about other health problems that can strike when traveling by air. One of these is a condition called hypoxia . It results from a lack of oxygen to the brain. Experts say the body begins losing oxygen minutes after an airplane leaves the ground. The air pressure in a plane during flight is lower than at sea level. This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground. Fewer oxygen molecules cross the tissues in the lungs and reach the bloodstream. The result is a five to twenty percent drop in the amount of oxygen in the blood. This reduces the amount of oxygen that reaches the organs of the body. One effect of this lack of oxygen to the brain is a headache. When this happens, the heart attempts to _ by beating harder and faster. This can make the traveler feel tired. These signs of hypoxia are not dangerous in a healthy person. But a drop in oxygen level can cause a health emergency in people with heart or lung problems. They might lose consciousness or even suffer a heart attack. Experts say that smoking cigarettes and drinking alcoholic liquids also reduce the body's ability to use oxygen. So they suggest that people not drink alcohol or smoke cigarettes either before or during a flight. They also say persons with heart or lung problems should seek advice from their doctors before flying. Question: The author writes the passage mainly to _ . Options: A: warn people in airplanes of possible dangers B: offer some advice on avoiding health problems C: explain the causes and effects of hypoxia D: advise people not to smoke or drink alcohol
**Answer**
C

*Question*
Read the article and select the best answer. Article: Forty-three years seems like a long time to remember the name of a mere acquaintance. I have forgotten the name of an old lady, who was a customer on the paper route in my home town when I was a twelve-year-old boy. Yet it stays in my memory, for she taught me a lesson of forgiveness that I shall never forget. On a winter afternoon, a friend and I were throwing stones onto the leaning roof of the old lady's house from a spot near her backyard. The object of our play was to observe how the stones changed to missiles as they rolled to the roof's edge and shot out into the yard. I found myself a perfectly smooth rock and threw it out. The stone, however, slipped from my hand and headed straight for a small window on the old lady's back porch. At the sound of fractured glass, we knew we were in trouble. We ran as fast as possible. I was too scared about getting caught to be concerned about the old lady with the broken window in winter. However, a few days later, when I was sure that I hadn't been discovered, I started to feel guilty for her misfortune. She still greeted me with a smile each day when I gave her the paper, but I was no longer able to act comfortably in her presence. I made up my mind that I would save my paper delivery money, and after three weeks I had the seven dollars that I thought would cover the cost of her window. I put the money in an envelope with a note explaining that I was sorry for breaking her window and hoped that the seven dollars would cover the cost. I put the letter through the letter slot in her door. My soul felt _ and I could have the freedom of, once again, looking straight into the old lady's kind eyes. The next day, I handed the old lady her paper and was able to return the warm smile that I was receiving from her. She gave me a bag of cookies. I thanked her and felt an envelope in it. When I opened the envelope, inside it were the seven dollars and a short note reading, "I'm proud of you." Question: How old is the writer now? _ Options: A: Forty three B: Forty five C: Fifty five D: Fifty six
**Answer**
C