Hello. I'm Jan from Mrs. Lake's class. My class wants to work together to help the public. We think we have found a great way to do this. Last month we did a class project on the highways near our town. We learned about the Adopt-a-Highway Program. This program brings people together to pick up litter along the roads. We think it would be a great idea for all students in our school to join the program and adopt a highway.

    Adopting a highway is not like adopting a pet. When a highway is adopted, only part of the highway is cared for by a group of people. The group agrees to work every week to keep its part of the highway clean. Each group gets its own sign that has the name of the group printed on it. The sign is put up at the side of the road. This sign lets drivers know who is keeping that area of the road clean.

    The Adopt-a-Highway Program is a great way for people to help their environment look nicer. Also, the government does not have to send out as many road workers. This saves money. Finally, people may try harder to keep roads clean if they see people, especially teenagers like us, cleaning them up.

    We will need helpers to care for our adopted highway. If you want to feel great and keep our roads clean，please come with your parents to the meeting next week. We will meet in Mrs. Lake' room on Wednesday at 6:00 P.M. At the meeting, we will talk about which roads are the dirtiest as a result of people's unkind acts. Then we' ll try to pick an area to adopt and clean.

    I look forward to seeing you at the meeting. Remember to keep our roads clean!

    World Expo 2010 will be held in Shanghai. It will last from May 1st to October 31st, 2010. The Expo site covers a total area of 5.28 km². It spans(横跨) both sides of the Huangpu River, with 3.93 km² in Pudong and 1.35 km² in Puxi. There are five functional zones marked A, B, C, D and E. Each of them has different functions.

    Zone A will host the national pavilions(国家馆) of Asian countries except southeast Asian ones.

    Zone B will be home to the China Pavilion(中国馆) and Oceania (大洋洲的) countries, Pavilions for International Organizations, Theme Pavilions(主题馆), Expo Centre, and Performance Centre etc.

    Zone C will host the national pavilions of European, American and African countries. A large public amusement park will be built at the entrance of this zone.

    Zone D is home to Corporate Pavilions(企业馆), the land is one of the original places of modern China's national industry. So some of the old industrial buildings will be kept and renovated(修复) into Expo pavilions.

    Zone E will host stand-alone(独立的) Corporate Pavilions, Urban Civilization Pavilion (城市文明馆), and Urban Best Practices Area.

    San Francisco has its cable cars. Seattle has its Space Needle. And, Longview has its squirrel bridge. The bridge, which has attracted international attention, is now a local landmark.

    The Nutty Narrows Bridge was built in 1963 by a local builder, Amos Peters, to give squirrels a way to cross the busy road without getting flattened by passing cars.

    The original bridge was built over Olympia Way on the west edge of the library grounds. Before the bridge was built, squirrels had to avoid traffic to and from the Park Plaza office building where office staff put out a nutty feast for the squirrels. Many times, Peters and others who worked in and near Park Plaza witnessed squirrels being run over.

    One day Peters found a dead squirrel with a nut still in its mouth, and that day's coffee break discussion turned into squirrel safety. The group of businessmen cooked up the squirrel bridge idea and formed a committee to ask the blessing of the City Council(市政会).The Council approved, and Councilwoman Bess LaRiviere named the bridge “Nutty Narrows.”

    After architects designed the bridge, Amos Peters and Bill Hutch started Construction, They built the 60-foot bridge from aluminum and lengths of fire hose(消防水带). It cost 1,000.

    It didn't take long before reports of squirrels using the bridge started. Squirrels were even seen guiding their young and teaching them the ropes. The story was picked up by the media, and Nutty Narrows became know in newspapers all over the world.

    In 1983, after 20 years of use, Peters took down the worn-out bridge. Repairs were made and crosspieces were replaced. The faded sign was repainted and in July 1983, hundreds of animal lovers attended the completion ceremony of the new bridge.

    Peters died in 1984, and a ten-foot wooden squirrel sculpture was placed near the bridge in memory of its builder and his devotion to the project.

    Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?

    Tap water that has been left to sit out slowly begins to acquire(获得) off taste. Many people think that this is because of microorganisms. But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it's most likely safe to drink.

    However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming(假设) you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.

    As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called biphenyl-A, or BPA, along with other things used to make plastic can leach(过滤) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer. Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.

    What makes a sense of humor is a difficult thing to tell. Different people find different things funny, and what may seem hilarious to some, will be highly rude to others. However, having some kind of sense of humor is important for reducing stress and getting along with others. Therefore, it's important to think about ways to improve your sense of humor.

    Look for the funny side of situations. While it can be difficult at times to find the funny side in unfortunate events when you're having a bad day, try to think about how the situation might look like to other people, and attempt not to get too angry. Laughing over minor accidents, trips and falls will help you in preventing the loss of temper that you will regret later.

    Learn some basic jokes. Some people find it hard to remember jokes, and feel left out when others are telling them. It's worth trying to learn a few jokes that you can pull out the bag when you need to, or regularly think about how you can turn a funny situation that occurs in daily life into an entertaining anecdote(趣闻) for later.

    Look at joke or humor cards. There are many different kinds of funny cards available, which can be a great inspiration for finding ways to improve your sense of humor. Giving an appropriate funny card to friends and family on the right occasion will show that you have a good sense of humor and are thinking about them.

    Learn from friends. Look at friends that you think have a great sense of humor. How do they deal with situations, and what kind of jokes do they make? Is there anything you can take away from their actions?

    It is not easy to become a doctor in the United States. The first step is getting into a medical college. More than one hundred and twenty American schools offer study programs for people wanting to be doctors.

    People can get advice about medical schools from many resources. One of these is the Princeton Review. The publication provides information about colleges, study programs and jobs.

    The Princeton Review says the competition to enter medical schools is strong. American medical schools have only about sixteen thousand of openings. But more than thirty-two thousand students may try it. Many of those are women.

    Most applicants contact more than one medical school. Some contact many. An important part of the application usually is the Medical College Admission Test which is called MCAT. The Association of American Medical Colleges provides the test by computer. It is offered in the United States and other countries.

    The people who want to enter medical schools are rated（评定）on reasoning, physical and biological sciences and an example of writing. Applicants for medical schools need to do well on the MCAT. They also need a good record in their college studies.

    Some students work for a year or two in a medical or research job before they attempt to enter a medical school.