Thang-ga is a special kind of painting. It started from the Tang Dynasty. Thang-ga paintings have attracted the public's attention in recent years. At the same time, the Chinese government has also tried hard to protect the culture.

    Thang-ga paintings were developed in the 7th century in the Tibetan area. The paintings are colourful and the paints used in Thang-ga paintings are different from those in other paintings. Because of the special environment of the Tibetan Plateau (高原) and the excellent painting skills, the colours of Thang-ga paintings look special. The paints in Thang-ga paintings in the past were made from minerals, including gold, silver, as well as some plants. Since they were made by hand, the beautiful colours could last for hundreds of years.

    However, with the development of machines, people now use cheaper and more easily-made chemicals to make paints. The traditional paints in Thang-ga paintings needed too much work and there were many secret methods. Later people stopped making the paints and forgot about them. So the skills were almost lost.

    Tigers are very strong and scary. We may see tigers in Europe, Asia and America in the mountains. The tigers live far away from {#blank#}1{#/blank#} houses. They eat birds, hares (野兔) and other small {#blank#}2{#/blank#}. In the day they hide in the dens (巢穴), and at night they go out {#blank#}3{#/blank#} food.

    In {#blank#}4{#/blank#} when tigers are hungry, they will become very {#blank#}5{#/blank#} But now, people cut down many {#blank#}6{#/blank#}, so tigers are losing their homes. Also, some people kill tigers to get {#blank#}7{#/blank#} fur. Some people even buy things made {#blank#}8{#/blank#} tiger bones (虎骨). So the number of tigers {#blank#}9{#/blank#} getting smaller and smaller.

    Animals are our {#blank#}10{#/blank#} friends. In order to protect them, we must build many natural reserves. And we must stop people from hunting.

    Cambodia (柬埔寨) is going to open the Angkor Wat temples (吴哥窟) at night to interest more tourists to the poor country.

    Tourism is an important foreign currency earner (外汇收入) for Cambodia. More than 1,000,000foreign people are going to visit it this year, and most of them are from South Korea, Japan and the United States. More than half of visitors will visit the Angkor Wat temples.

    Now visitors must walk out of Angkor Wat temples at sunset, but Cambodia is going to extend (延长) the visiting hours to as late as 8:30p. m.

    "We want visitors to see all views of the temples, even in the dark places where they may not see some of the sculptures and statues," Bun Narith said.

    But as hotels are more and more, people need lots of underground water. People say the uncontrolled pumping (无节制地抽水) of underground water is bad for the Earth under the temples.

①Eating good food and getting proper exercise are important to stay healthy. Getting enough sleep is important, too. Experts say that teenagers between the ages of 15 and 20 need 8 to 10 hours of sleep each night. 

②Your body needs to take a rest from all the activities it has done during the day. Your brain needs a rest, too. You are likely to get sick easier without enough sleep. 

③You have a "24-hour clock" inside your body that tells you when to be awake and when to go to sleep.  ▲  Blue light that comes from the Sun tells your brain to keep you awake during the day. When there is no blue light at night, the brain tells the body that it's time for sleep. 

④There are many things that stop the brain from telling your body when it's time to sleep. One of these is blue light at night. Today, people spend a lot of time watching television or looking at screens on computers or smart phones. These devices (装置) give off blue light. If you look at them at night, the blue light can trick your body into thinking it's daytime. Then it is more difficult to go to sleep.

⑤What should you do to get good sleep? Experts say that you shouldn't look at screens that give off blue light for at least one hour before going to sleep. 

⑥ Do not watch TV or use anything with a computer screen in bed. If you need to do something to fall asleep, it is better to read a book. Also, keep your bedroom as dark as you can. This will help you sleep well. 

Hi, everybody. Here we're in front of the South Gate. Go straight on, and you'll find the Panda House. Pandas are cute. They like to eat bamboo and lie down all day long. Every year, lots of visitors come here to see them. 

Walk along the road. To the north of the Panda House, you'll find the lions. Lions are the kings of the animal world. Remember that they're dangerous. Never go near them. 

Turn left, and to the west of the Lions' Area, you'll find the World of Birds. Birds make beautiful sounds when they sing. To the north of the World of Birds is the Monkeys' Forest. Monkeys are clever and funny. They jump around and make people laugh. 

Then turn right, and to the east of the Monkeys' Forest, you'll see the giraffes(长颈鹿). They're quite tall. Their long necks help them eat the leaves from trees. 

Northeast of the giraffes there's a bridge. Cross the bridge, and you'll see the elephants. Their large ears are like open fans. 

Here you can see all kinds of animals. Have a nice trip!