阅读判断 Across the Deserts 阅读判断 A Dogs Dilemma 阅读理解 American Get Touchy 完形填空 A Powerful Influence 阅读理解 Can Buildings Be Designed to Resist Terrorist Attack? 阅读理解 Defending the Theory of Evolution Still Seems Needed 阅读理解 Eat to Live 补全短文 Einstein Named “Person of the Century” 完形填空 Family History 阅读理解 Finding Enlightenment in Scotland 阅读理解 Going Her Own Way 概括大意与完成句子 Heartbeat of America 完形填空 Helen and Martin 概括大意与完成句子 Intelligence: a Changed View 概括大意与完成句子 Is There a Way to Keep the Britains Economy Growing 阅读理解 Life as a Movie Extra 阅读判断 Lower Body Fat Means Better Performance 补全短文 Men Smell of Cheese and Women of Onions 阅读理解 Narrow Escape 阅读理解 Native American Pottery 阅读理解 New US Plan for Disease Prevention 阅读理解 Older Volcanic Eruptions 阅读理解 Pop Music in Africa 阅读理解 Sauna 完型填空 School Lunch 概括大意与完成句子 Smoke Gets in Your Mind 阅读判断 Stage Fright 1 阅读判断 Starting a New Tradition 补全短文 Style, Not Fashion 阅读理解 The Beginning of American Literature 阅读判断 The National Trust 完形填空 The Old Gate 阅读理解 The Operation of International Airlines 阅读理解 The Romance of Arthur 补全短文 The Sandwich Generation 补全短文 The value of motherhood 补全短文 The Value of Tears 阅读理解 To Have and Have Not 补全短文 Virtual Driver 概括大意与完成句子 Ward off1 Travel Bugs 阅读理解 Why So Many Children? 阅读理解 Women Staying in Mini-Skirts for Longer阅读判断 Across the DesertsThe Sahara Desert is the largest desert in the world. It stretches across Africa from Senegal to Egypt. The Sahara Desert is an unfriendly environment. During the day its very hot, and at night its sometimes very cold. It is also difficult to find water in the Sahara.In 2006, Kevin Lin, Ray Zahab, and Charlie Engle decided to do something very difficult. They made the decision to run across the Sahara Desert 4,300 miles (6,920km). It seemed impossible to do, but they wanted to try. The three men liked to test themselves, and this would be a very big test.On the morning of November 2, Kevin, Ray, and Charlie started their trip across the Sahara. Every morning they began running at 5:00. At11 a.m. they stopped and rested until 5 p.m. Then they ran again until 9:30 in the evening. Each day they ran about 40 miles (64 km). Every day it was the same thing. They got up and ran. They listened to music on their iPods, and they ran and ran.Kevin, Ray, and Charlie needed to eat a lot of food during their trip. Most people need about 2,000 calories of food each day. Kevin, Ray, and Charlie needed between 6,000 and 9,000 calories every day. Thats a lot of food! They also needed to drink a lot of water.The three men had some problems on their trip, and many times they wanted to quit and go home. It was often very hot (140F/60C) during the day, and the heat made them sick. Their legs and feet hurt. Sometimes it was very windy, and they couldnt see. One time they got lost. But they didnt quit. After 111 days, Kevin, Ray; and Charlie successfully finished their trip across the Sahara Desert. They hugged each other and put their hands in the water of the Red Sea. Then they ran to a hotel to take a long shower.1. Its not always hot m the Sahara Desert. A. Right 2. Each day the men ran for approximately eight hours. B. Wrong 3. In the middle of the day: the men usually stopped running. A. Right 4. They sometimes felt sick because it was so hot. A. Right 5. Sometimes they couldnt see the road because it was windy. A. Right 6. Luckily, they never got lost. B. Wrong 7. On their trip across the desert: the three men ran through five countries. C. mentioned 阅读判断 A Dogs Dilemma Finding a babysitterwhile you go out to work is, for example, an inconvenience(. For the African wild dog, one of the continentsmost endangeredcarnivores, its a matter of life and death. New research shows that once packs fall below a certain size, they are not enough animals to both hunt food and stay at home protectingthe young. The African wild dog has declineddrasticallyover the past century. Habitualloss, persecutionand unexplainedoutbreaksof disease have all been blamed Only 3 000 to 5 000 animals remain, and the speciesis expectedto go extinctwithin decadesif the trendcontinues. Other large carnivoressuch as the spottedhyenaface similarpressures, yet are not declining. Now Franck Courchamp of Cambridge University has found a reason why. The dogs weaknesslies in its social organization.Within each pack of up to 20 adultsand pups, only the dominantmale and female breed. The remaining animals help raise the pups, cooperatingto hunt prey and defend the kill from other carnivores Because pups cant keep up on a hunt, large packs leave an adult behind to protectthem from predators, which include lions and hyenas . But leaving a babysitter also carries costs . A smaller hunting party is less able to tackle large prey and to defend the kill. There is also one less stomach in which to carry food back to the den and one more mouth to feed when they get there. Courchamp investigated this awkward trade-off