Read the article and select the best answer. Article: You know that balloons must be kept away from sharp objects. They also needed to be kept away from flames. A fire can weaken the rubber and cause it to break. However, in this experiment you will find out how you can hold a balloon directly in a flame without breaking the balloon. Materials needed: * two round balloons not inflated * several matches * water Inflate one of the balloons and tie it. Place 1/4 cup of water in the other balloon, and then inflate it and tie it. Light a match and hold it under the first balloon. Allow the flame to touch the balloon. What happens? The balloon breaks, perhaps even before the flame touches it. Light another match. Hold it directly under the water in the second balloon. Allow the flame to touch the balloon. What happens to this balloon? It doesn't break. Why does the balloon with no water break in the flame? The flame heats the rubber of both balloons. The rubber of the balloon without water becomes so hot that it becomes too weak to _ the pressure of the air inside the balloon. However, when the balloon with water in it is placed in the flame, the water takes in most of the heat from the flame. Then, the rubber of the balloon doesn't become very hot, it doesn't weaken, and the balloon doesn't break. Water is a particularly good absorber of heat. It takes a lot of heat to change the temperature of water. On the other hand, when water cools, it gives off a great deal of heat. That's why areas near oceans or other large bodies of water don't get as cold in winter as areas at the same latitude further inland. Question: From the passage we can know the following aspects of the experiment except _ . Options: A: method B: material C: result D: time
D

Read the article and select the best answer. Article: Elizabeth and I are 18 now, and about to graduate. I think about our elementary-school friendship, but some memories have blurred .What happened that day in the fifth grade when Beth suddenly stopped speaking to me? Does she know that I've been thinking about her for seven years? If only we could go back, discover what ended our relationship. I have to speak with Beth. I see her sometimes, and find out school is "fine". It's not the same. It never will be. Someone says that she's Liz now. What happened to Beth? I can't call her. Should I write? What if she doesn't answer me? How will I know what she's thinking? Yes, I'll write her a letter. These things are easier to express in writing. " Dear Be,"no, "Dear Li," no, "Dear Elizabeth," I begin. The words flow freely, as seven-year old memories are reborn. I ask her all the questions that have been left unanswered in my mind, and pray she will answer. I seal my thoughts in the perfect white envelope, and imagine Beth looking into her mailbox. Will she know why I'm writing? Maybe she once thought of writing the same letter. As the mailman takes my envelope from me forever, I wonder if I've made the right decision. Do I have the right to force myself into Beth's life again? Am I simply part of the past? I have taken the first step. Beth has control of the situation now. One day has passed. Are my words lying on the bottom of the post office floor? Two days are gone. I'm lost in thought and don't even hear the phone ring. "Hello? It's Elizabeth." Question: How old were they when they didn't speak to each other? Options: A: 18 B: 12 C: 13 D: 11
D

Read the article and select the best answer. Article: Rae Armantrout, who has been a poetry professor at the University of California San Diego(UCSD) for two decades, has won the 2010 Pulitzer Prize in the poetry category for her most recent book, "Versed". "I'm delighted and amazed at how much media recognition that the Pulitzer brings, as compared to even the National Book Critics Award, which I was also surprised and delighted to win," said Armantrout. "For a long time, my writing has been just below the media radar, and to have this kind of attention, suddenly, with my 10th book, is really surprising." Armantrout, a native Californian, received her bachelor's degree at UC Berkeley, where she studied with noted poet Denise Levertov, and her master's in creative writing from San Francisco State University. She is a founding member of Language Poets, a group in American poetry that analyzes the way language is used and raises questions to make the reader think. In March, she won the National Book Critics Circle Award for "Versed." "This book has gotten more attention," Armantrout said, "but I don't feel as if it's better." The first half of "Versed" focuses on the dark forces taking hold of the United States as it fought the war against Iraq. The second half looks at the dark forces casting a shadow over her own life after Armantrout was diagnosed with cancer in 2006. Armantrout was shocked to learn she had won the Pulitzer but many of her colleagues were not. "Rae Armantrout is a unique voice in American poetry," said Seth Lerer, head of Arts and Humanities at UCSD. "Versed", published by the Wesleyan University Press, did appear in a larger printing than her earlier works, which is about 2,700 copies. The new edition is scheduled to appear in May. Question: According to Rae Armantrout, _ . Options: A: her 10th book is much better B: her winning the Pulitzer is unexpected C: the media is surprised at her works D: she likes being recognized by her readers
B

Read the article and select the best answer. Article: One in every five young people has a sleep problem, so you're not alone; Getting enough sleep has become as important as eating vegetables and exercising regularly. It's very important for your body. Most young people only get seven hours of sleep each night, when they actually need nine hours. And making up for lost sleep during the week by sleeping in on weekends doesn't really work. In fact, sleeping late on weekends may actually do you more harm than good, if you have sleep problems. What happens if you don't get enough sleep? If your sleep problem continues for a few nights, you could suffer serious problems. Lack of sleep can affect learning and memory. Worse , if your sleep difficulties last a long time , that could lead to anxiety or depression . Therefore, you've got to have some healthy sleep habits. Below are some suggestions: * GO TO BED AT THE SAME TIME--including weekends , if possible . * WAKE UP AROUND THE SAME TIME EVERY MORNING . When you sleep late just one morning during the week, it may disturb your body clock. This will make it hard for you to sleep that night. * DO SMOETHING REALXING before going to bed . * EXERCISE DURING THE DAY . Don't exercise right before going to bed. * AVOID DRINKING ALCOHOL. Alcohol makes you excited. This prevents you from falling asleep or wakes you up during the night. * DON'T SMOKE . Smoking is always bad for the body. Smoking before bedtime keeps you awake. If trying these tips over a couple of weeks does not help you, speak to your doctor. Do not take any sleeping pills without first asking your doctor. Many have strong side effects. Question: Which of the following is TRUE according to the passage? Options: A: You'll no longer have your sleep problem if you try the tips. B: Sleeping late on weekends can make up for lost sleep . C: Exercising in the evening will help you get to sleep D: Sleep problems are serious among young people.
D