閱讀理解

　　All our food comes from the soil(土壤)．Some of us eat meat, but animals live on plants．If these were no plants, we should have no animals and meat．So the soil is necessary for life．

　　The top of ground is usually covered with grass or other plants．Plants grow in soil, which has a dark color．This dark soil is humus, dead leaves, dead plants and animal waste make it, but this takes a long time．When the humus has been made, plants can grow well in it．

　　All soil needs food．If we don’t give it any, the plants will be weak．Animals waste is the best food for the soil, but chemical fertilizers(化肥)are also very useful．The same crop should not be grown in the same place every year; it is better to have a different crop．A change of crop and the use of a good fertilizer will keep the land in good condition．

　　When the soil is dry, the wind blows it away．Sometimes heavy rain carries the humus down to a river．People should grow more and more trees and grass to stop wind from carrying the humus away．It takes hundreds of years to make humus, and so we must save every bit of it．Without soil, where can we grow food?

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閱讀下列短文，從每題所給的四個選項(xiàng)(A、B、C、D)中，選出最佳選項(xiàng)。

　　Wild animals are our friends, but many of them are getting fewer and fewer．We should try to protect them．The four animals below are now in danger．

　　Tibetan Antelopes

　　Tibetan antelopes(藏羚羊)are medium－sized animals．They mainly feed on grass．They are usually found in groups of about 20．They are killed for their wool, which is warm, soft and fine and can be made into expensive clothes．Although people can get the wool without killing the animals, people simply kill them before taking the wool．The number of them is dropping year by year．There are less than 75, 000 Tibetan antelopes left in the world, down from a million 50 years ago．

　　Golden Monkeys

　　Golden monkeys are mainly found in Sichuan, Gansu, Shanxi provinces and Shengnongjia mountainous area of Hubei Province．Golden monkeys have golden－orange fur．They move around in the daytime, usually in groups of as many as 100 to 200 heads, or 20 to 30 heads．They feed on fruits and young leaves of bamboos．But people are destroying the environment where they live．Trees and bamboos are disappearing, so golden monkeys have less and less to eat．

　　Elephans

　　Elephants are very big and strong．They are bigger than any other animals on land．They are grey and have long trunks and tusks．They have poor eyesight, but very good hearing and smell．They can lift heavy things and break down branches with their trunks．Elephants are very friendly towards each other and towards their neighbours．Normally, they live in a group for many years．Young male elephants do not leave the group until they are about 12 years old．Now, there are very few elephants in the world．The number of them is becoming smaller and smaller because their living areas are used for farming．Also, people hunt them for their tusks．

　　Wolves

　　Wolves are not very big．They have grey fur．Wolves have very good eyesight, hearing and smell．Wolves’ food is vavious．They eat animals, insects and snails．They are friendly to each other and never attack people．They do not kill for fun．Wolves are in danger, too．They are losing their living areas because people cut down forests．Soon they will have no home or food．

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