Getting enough sleep on a regular basis is one important way to protect the health of your heart. Poor sleep is associated with a range of cardiovascular  problems, including high blood pressure, heart attack, and heart failure. Both men and women are at increased risk for these conditions. But we continue to learn that when it comes to health problems associated with sleep, the particular risks to men and women are not always the same. A new study suggests that for women who already have heart disease, poor sleep may be particularly dangerous to their heart health. Research indicates that poor-quality sleep--and waking too early in particular--is associated with increased inflammation  among women with heart disease. There was no similar association found for men, suggesting that women with heart disease and sleep problems may be at particular risk for inflammation that can be damaging to the heart. Researchers at the University of California, San Francisco investigated the relationship between sleep quality and inflammation linked to coronary  heart disease. They also sought information about how an association between sleep and inflammation might differ between men and women. Their investigation included 980 men and women at first, and 626 completed the 5-year study. All of those included were suffering for coronary heart disease. The average age of men in the study was 66. Women were slightly younger, with an average age of 64. Researchers measured sleep quality by asking participants to rate their sleep over the previous month. They also asked for reports of some of the most common sleep problems, including difficulty falling asleep, difficulty staying asleep, waking frequently throughout the night, and waking too early in the morning. After 5 years, researchers repeated tests for inflammation and once again sought reports on sleep quality and sleep problems. When they analyzed data for both men and women together, researchers found no links between inflammations and sleep quality. However, when they... When a person suffers from sleep disorder   _  . A) he/she is sure to have cardiovascular problems B) he/she may be in a state of poor health C) he/she must be in danger of heart disease D) he/she might get on poorly with others
B

Clothes can make phone calls, play music, dial your pal's number, keep you warm during cold weather and operate your computer? This is not a fantasy. A British company, called Electrotextiles, has created a wide range of clothes -- clothes that have minds of their own! Scientists, working for the company, have invented a kind of fabric that can be blended  with flexible electronic materials to create intelligent clothing. The result are electronic garments. If you think the wearer has to be wired to different devices, think again. These designer clothes are wire-free, soft to touch and washable!! Like any electronic device, these high-tech clothes have to be powered. Currently, a tiny nine-volt battery serves the purpose. But the researchers hope that in the near future the clothes will generate electricity by using body heat. These clothes are 100 percent shock proof, they say. The Electrotextiles team has also created the world's first cloth keyboard. This keyboard can be sewn into your trousers or skirt. To use this device, you will have to sit down and tap on your lap! These 'lap- tap' gadgets  are all set to take over laptop computers! Another useful garment is the shirt-cum-mobile phone. This handy invention enables drivers to chat comfortably with others at the wheel! Other popular electronic wear include the denim  jacket with flexible earphones sewn into the hood  and the electronic ski jacket with a built-in heater. The ski jacket is also programmed to send signals to a satellite. This technology is known as global positioning system and can be used to track lost skiers and wandering kids. Having completed the cloth keyboard, scientists have already started to work on a new project--a necktie that can be used as a computer mouse. What is the next? Do you have any idea? . The electronic garments are similar to other electronic devices in that   _  . A) they feel smooth and soft B) they use electricity as power C) they can be washed in water D) they are made from flexible materials
B

Scientist Florence Wambugu works with farmers in Kenya, a country in East Africa. She helps them grow bigger and better crops. Wambugu is especially interested in finding simple ways to produce more food. In the past ten years, Wambugu has spent much of her time studying sweet potatoes, which are an important food in her part of Kenya. A virus   kept attacking the plants. It stopped the sweet potatoes from growing well. Because of the virus, some farmers lost three quarters of their crops. Wambugu went to war against the virus. Her research for a way to save the sweet potatoes led to a lab in St. Louis, Missouri. The lab mainly works on genes  , the chemical "computer programs" found in the cells of living things. Genes tell a plant to produce pink flowers or an animal to grow black hair. Now scientists have found ways to move genes from one living thing to another. That process is called genetic engineering. Wambugu spent three years in the lab. As a result, she created a sweet potato plant that could fight off the virus. Wambugu tested her research in Kenya, and her plants produced wonderful sweet potatoes. That's just the beginning, Wambugu believes. Genetically modified   foods, she thinks, could help farmers in poor countries grow badly needed crops, thus, fewer people will go hungry. The text is written mainly to   _  . A) tell us sweet potatoes are in danger of being attacked by a virus B) introduce Wambugu's contribution to genetic engineering C) introduce a new way of killing plant viruses D) tell how hard Wambugu worked in her lab for three years
B

Are you taking a summer vacation this year? If you are, have you already started preparing for your trip? Online, there are a large number of preparation tips available for summer travelers. While preparation advice and tips may be of assistance to you, they are often hard to go by. This is because not everyone spends vacations at the same location. No matter what your vacation destination is, you will need to take the climate into consideration. If you are visiting a tropical location, you will need to bring along the appropriate clothing. While you may be expecting warm and sunny weather, it is still advised that you prepare for the worst. Raincoats and an umbrella may be a great addition to your summer clothing. Perhaps, the most popular summer vacation destination is the beach. Each year millions of individuals and families flock to beaches. When vacationing at the beach, it is important that you bring along proper clothing and sunscreen. Many vacationers do not realize the dangers of sunbathing without sunscreen. In addition to sunscreen, you will need to make sure that you have beach towels and plenty of water on hand. For the most part, if you forget to bring along certain supplies you can purchase replacements. Many popular vacation destinations have inflated prices. To prevent unnecessary expenses, you are encouraged to check your luggage before you leave. In addition to the above mentioned preparation tips, you must inform friends and family of where you are going. In case something happens back home, you can easily be reached. If you travel to a tropical country,   _  . A) you must consider the climate first B) you should wear shorts and T-shirts C) you must prepare proper clothes D) you should expect the sunny weather

C