阅读理解

　　It is said that another acre of the world’s forest will be destroyed forever．Why is this happening? There are two reasons－land and wood．In many countries the trees have been cut down because the land was needed for animals or crops．In other parts of the world the trees are cut down because their wood is wanted．This wood is used by local people for firewood or it is used for building．But many people don’t know that in most places the trees won’t be replaced．The soil in the forests is very thin, but it is protected by the trees．When the trees are cut down, the soil is washed away by the rain or blown away by the wind．Soon nothing can be grown on it．The forest becomes a desert．Then more land will be needed, and more trees will be cut down．

When the forest is destroyed, it isn’t only the trees that are lost－the homes of millions of animals and plants are destroyed, too．All kinds of animals are in danger－fish，reptiles, birds, mammals, insects, and shellfish － as well as thousands of plants．

　　Who is to blame for this? The answer is simple：all of us．There are just too many people in the world．The world’s population is now six billion．Of course, it’s very easy to blame the local people．We don’t cut down trees．They do．But the products are bought by people like you and me－wood houses, beds, tables, chairs, paper… Why are the forests being destroyed? Just look around．You are probably using it right now．

完形填空。

　　You may feel curious(好奇的)about students in other countries：Do they also have 　　1　　 homework?What do they do in their spare time?

　　On April 8, a report came out on the lives of high school students in China, Japan, South Korea and the US．It surveyed around 6,200 students from the 　　2　　 countries last year．You will find the 　　3　　 to many of your questions in this report．

　　Chinese students spend the most time 　　4　　．Nearly half of Chinese students spend more than two hours on their homework every day．That's 　　5　　 more than students of the US(26.4％), Japan(8.2％)and South Korea(5.2％)．

　　Who sleeps 　　6　　 in class?

　　Japanese students fall asleep in class most often．About 45％ of them said they sometimes doze off(打瞌睡)in class．In South Korea, it's 32％; in the US, 21％; and 5％ in 　　7　　．

　　South Korean students don't like 　　8　　 notes．About 70％ said they write down what the teacher says in class, many fewer than in Japan(93％), China(90％)and the US(89％)．

　　Who is the most distracted(分心的)?

　　American students are the most active in class, 　　9　　 also the most distracted：64.2％ said they chat with friends in class; 46.9％ said they eat snacks in class; and 38.9％ said they send e-mails or read unrelated(无关的)books in class．

　　What do they do 　　10　　?

　　In their spare time, most Chinese students study or surf the Internet．Most American students hang out with their friends．Most Japanese students do exercise．Most Korean students watch TV．