题目内容
They feed many ______on their farm, and they often eat ______.
- A.chickens; chicken
- B.chicken; chicken
- C.chickens; chickens
试题分析：句意：他们在农场里饲养了很多的鸡，他们常常吃鸡肉。chicken作为鸡理解，是可数名词，有复数形式，chicken作为鸡肉理解，为不可数名词，无复数形式。故选A.
考点：chicken一词的用法
点评：chicken一词的用法并不难，学生在平时的基础知识学习时，要对这些知识进行背诵，同时掌握好意思上的区别，用法上的区别，在考试时才能很好的答出。
阅读快车系列答案An apple a day may keep aging away.
The research chose fruit flies(果蝇), as they share many genes(基因)with humans. The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet.
It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk，climb and move about as they aged.
According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses，as well as aging.
In another study，researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.
The apples’ genetic code(遗传密码) was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.
Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy’’apples on supermarket shelves within just four or five years.
The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today’s apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits.
【小题1】Why were fruit flies used for the research?
| A．Because they have a similar diet to humans. |
| B．Because they have a history as long as apples. |
| C．Because they share a lot of genes with humans. |
| D．Because they feed on nothing but apple extract. |
| A．Apples produce chemicals that can change human genes. |
| B．Apples have antioxidants that kill chemicals that cause aging. |
| C．Apples are rich in vitamins that are needed in humans’bodies. |
| D．Apples produce chemicals that make apples taste more delicious. |
| A．Their genes stopped their development as the environment got worse. |
| B．Their genes became twice in number but they finally died off like dinosaurs. |
| C．They experienced a great genetic change making them used to worse conditions. |
| D．They went through a similar development to peaches, strawberries and other related fruits. |
| A．Eating apples may bring us more advantages than we might believe before. |
| B．People who have the habit of eating apples don’t need to see a doctor. |
| C．Apples that kill the desire to eat are already available in supermarkets now. |
| D．People will eat apples instead of peaches and strawberries from now on. |
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.
Elephants
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 various. 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.
【小题1】Tibetan antelopes usually live in groups of about _______.
| A．20 | B．30 | C．100 | D．200 |
| A．Tibetan antelopes. | B．Golden monkeys. |
| C．Elephants. | D．Wolves |
| A．There are less than 7,500 Tibetan antelopes left in the world now. |
| B．Golden monkeys usually move around during the night. |
| C．Elephants have good eyesight, but very poor hearing and smell. |
| D．Wolves are friendly to each other and they never attack people. |
| A．Wild animals in danger |
| B．How to hunt wild animals |
| C．Animals in the zoo |
| D．How to train the animals |
Pandas are our Chinese treasure. They feed on(主食) __________.
|
A．bamboo |
B．animals |
C．meat |
D．vegetables |