All over the world people swim for fun. Swimming is enjoyed by people of 1 ages, from the very young to the very old. There are many places for people to swim in swimming pools. Many schools, hotels and clubs have swimming pools. Some people have pools of 2 in their yards.
Swimming is one of 3 forms of exercise. It can 4 hearts and bodies strong. It can also help blood circulate(循环). Handicapped(残疾的)people can keep their bodies in better condition by swimming 5 they can't enjoy sports.
 6  is a good idea for parents to see to it(务必做到) that their children learn to swim 7 an early age. So their children will 8 it for the rest of their lives.
There are many rules for water safety. These rules can help save not only your life 9 the life of a friend. First of all, know 10 . Many schools 11  swimming lessons to children. Adults(成人) can learn to swim at public pools.  12  rule to remember is never to swim  13 . Always swim with a friend and know  14  in the water at all times. It is best to swim  15  in safe places if you are beginners. If every one learned to swim and obeyed the rules for water safety, most drawing(溺水) could be avoided.  

A predator(捕食性动物) kills and eats other animals as prey(猎物).Sometimes it also becomes food for other predators. Polar bears are the largest of all the land predators. They can run across snow and swim in icy water for hours without rest. Their favorite food is seal. Not all big animals live on small animals. Hippos have heavy bodies and huge mouths. But they don’t eat animals. They just eat grass.
Some predators use speed to catch their prey. Cheetahs are the fastest animals on land. They can run up to 70km an hour. Other predators use their senses to find their food. Sharks can see, smell, hear, feel and taste. They can also sense electrical currents(电流 )from other animals’ bodies. Some fish try to hide themselves, but with this sixth sense, sharks can always find them. Sharks have smooth bodies. This helps them swim without using lots of energy. They need to save their energy because they never really sleep and never stop hunting. Flying is a useful skill for many predators in the sky. The butcher bird is the most interesting predator. It has a special way of eating its prey. First it kills its prey. Then it hangs it on a fence or in a tree, just like a butcher hangs meat in his shop. Finally, it eats its prey.
Some people hunt and kill more animals than any other predator. They not only hunt for food. They also hunt for fun. They kill sharks for their fins, and tigers for skins. Those human hunters are the worst predators on Earth.
【小题1】The following statements are about “predators”, which one is true?

A student newspaper reports that most students go to sleep at 1:30 am. Even if that’s an overstatement (夸张), it’s close to the truth. Scientists say teens should sleep nine hours each night. But that’s hard. Some are even “pulling all-nighters” (开夜车). These students must hand in their homework the next day but they haven’t done it. In the morning they don’t look healthy and you can tell who’s been doing it. One of my classmates did a survey on the topic. She found that most kids pull all-nighters to finish homework, but some do it for other reasons, such as playing computer games!
Maybe our lack(缺乏) of sleep is because of laziness — I think I’m a rather lazy student — or maybe it’s because we have too much to do in American high schools. I usually go to bed around midnight. If I stayed up past 1:30 am, I wouldn’t get any work done. I’d be falling asleep at my computer. My classes begin at 7:30 am. I’m partly awake in my first class. By the second, I’m a little sleepy. By my third class, I’m sleepy. By midday I’m finally fully awake. But by 3:00 pm, I’m slowing down again. Yet I get more sleep than usual students.
Most American high schools seem to have a similar(相似的) problem with sleepy students. High school classes start at 7:30 am, so students have to get up one and a half hours before that to get ready and catch the bus. It’s believed that lack of sleep can be bad for both grades and health. Some schools are paying attention. Classes in those schools start at 8:30 am.
【小题1】What does the underlined sentence “it’s close to the truth” mean?

A famous building in New York City is turning 100 years old. A year-long celebration is planned for Grand Central Terminal, which is usually called Grand Central station, the sixth most-visited place in the world.
The huge building has not changed much since it opened in February, 1913. About 750,000 people pass through Grand Central every day. Some just come to look at it, others to visit the stores. But most are there to catch the trains that enter and leave from the station. It is the largest train station in the world. There are 67 train tracks, all of them underground.
The main part of the building has large, arched windows, a jeweled four-sided clock and ticket windows. Grand Central has been seen in many movies through the years. Dan Brucker is with the New York Transit Authority, which operates the station. Dan Brucker has worked for the transit authority at Grand Central for 30 years. In all those years, he has not lost his interest in the building.
Justin Ferate, a historian, has been giving tours of Grand Central Station for 30 years. He says the station was designed to make travel a pleasure.
“Why people don't run into each other in Grand Central is simple: each block of stone in Grand Central is the length of your leg. Each block of stone in Grand Central is the length of your arm. Each block of stone is a different color, so it’s a checkerboard, based on you.”   
A ten-year-long fight against plans to build a huge office building over Grand Central in 1968 helped create the modern preservation（保护） movement. Now, no one would think of changing the beauty of the station.
【小题1】How long has Grand Central been in service ?