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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.It doesn’t tell the truth. | B.It is quite true. |
C.It is impossible. | D.I don’t think it’s right. |
A.They play computer games. | B.They watch videos late. |
C.They have to do a lot of housework. | D.They have to do a lot of homework. |
A.At 7:30 am. | B.At 6:00 am. | C.At 9:00 am. | D.At about 7:00 am. |
A.The writer usually stays up past 1:30 am. |
B.The writer usually goes to bed around midnight. |
C.The writer usually does a survey. |
D.Many American students don’t get enough sleep, so they can have high grades. |
A.Something has to be done to solve the problem of students’ lack of sleep. |
B.Many American high school students are sleepy in class. |
C.Many kids have too much homework to do. |
D.Students can’t play computer games. |
Many desserts are covered in sand. But some have mountains, rocks, or lakes that have dried up in the heat. The Great American Dessert has cliffs(悬崖) that have been made into amazing and beautiful shapes by the wind. The Sahara Desert in Africa is mostly sand. The Australian Desert has red sand.
Sometimes it does not rain for a whole year in the desert. But there is water deep under the ground and some plants have roots that go very deep to find it. Other plants have roots that spread out(延伸) a long way so they can suck up the rain as soon as it falls.
One desert plant is the cactus, which has long, spreading roots. The cactus stores water inside its hard skin. This skin protects it from heat and cold.
Camels are a bit like cactus plants! They store water too—inside their bodies. They have special fur which protects them from the sun during the day and keeps them warm at night.
Some other animals live in deserts, too. They have to be very good at seeing and hearing because most of them only come out at night. This is why many desert animals have extra big eyes or ears.
A desert fox has bigger ears than a normal for. A gerbil has huge eye, so that it can see at night. It stays cool in the day by staying underground, like most desert animals.
Some people live in the desert but they always make their homes near an oasis. An oasis is where water comes from an underground river. Near an oasis, people can grow lots of plants and keep animals.
Life is hard in the desert, for people, animals and plants. But desert people like to live there.
【小题1】A desert is very dry because__________.
A.it is sandy | B.there is so little rain |
C.the wind is strong | D.there is no water deep under the ground |
A.围堵 | B.讨好 | C.释放 | D.吸收 |
A.the sunlight is too strong in the day | B.they need to see and hear well at night |
C.it is very cold at nigh | D.they store water in them. |
A.storing water in side their bodies | B.drinking water as much as they can |
C.staying underground | D.growing lots of plants |
A.Desert people like to live in the desert though life is hard. |
B.People in the desert usually fry eggs on the ground. |
C.Camels have special fur to store water. |
D.All the deserts are covered in sand. |
A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 1 in Hong Kong, these trees were cut down and burnt. Now there is 2 forest left, though there are still some small areas covered with trees. We call these woods.
Elephants, tigers and many 3 animals were living in the thick forest. When people came to live in Hong Kong, the 4 began to die out. Early farmers grew rice and 5 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed 6 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. So did 7 of the wolves and tigers. Monkeys and many other animals soon 8 in the same way.
You might think that there are no longer any animals in Hong Kong 9 in the zoos. But there are still about 36 different animals 10 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals 11 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet(英尺) 12 . They make a noise rather like a dog 13 . In Hong Kong the barking deer has only a real enemy-- 14 . People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important 15 people to protect wild animals.
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A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 31 in Hong Kong, these trees were cut down and burnt. Now there is 32 forest left, though there are still some small areas covered with trees. We call these woods.
Elephants, tigers and many 33 animals were living in the thick forest. When people came to live in Hong Kong, the 34 began to die out. Early farmers grew rice and 35 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed 36 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. 37 did most of the wolves and tigers. Monkeys and many other animals soon 38 in the same way.
You might think that there are no longer any animals in Hong Kong 39 in the zoos. But there are still about 36 different animals 40 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals 41 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet 42 . They make a noise rather like a dog 43 . In Hong Kong the barking deer has only a real enemy-- 44 . People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important 45 people to protect wild animals.
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A thousand years ago Hong Kong was covered by a thick forest. As more and more people came to 1 in Hong Kong, these trees were cut down and burnt. Now there is 2 forest left, though there are still some small areas covered with trees. We call these woods.
Elephants, tigers and many 3 animals were living in the thick forest. When people came to live in Hong Kong, the 4 began to die out. Early farmers grew rice and 5 pigs and chickens in the valleys. They cut down the trees and burnt them. They needed 6 to keep themselves warm in winter, to cook their food and to keep away the dangerous animals. Elephants quickly disappeared because there was not enough food for them. So did 7 of the wolves and tigers. Monkeys and many other animals soon 8 in the same way.
You might think that there are no longer any animals in Hong Kong 9 in the zoos. But there are still about 36 different animals 10 there. One of the most interesting of Hong Kong's animals is the barking deer. These are beautiful little animals 11 a rich brown coat and a white patch (补丁) under the tail. They look like deer but they are much smaller. They are less than two feet(英尺) 12 . They make a noise rather like a dog 13 . In Hong Kong the barking deer has only a real enemy-- 14 . People hunt these little animals though it is illegal (违法的). There are now not many barking deer left. So it is important 15 people to protect wild animals.
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