题目内容
Yellow, orange, red and green tree leaves make autumn a colorful time! Who paints all these colors? It is the leaves themselves.
Inside a leaf, there are millions of little color “bags”. They are green, yellow and orange. The green ones are called chlorophyll (叶绿素). The yellow ones are called xanthophylls (叶黄素). The orange ones are carotene (胡萝卜素).
In the summer, the green chlorophyll is very, very busy. It makes food for the tree. It catches sunlight to change water and carbon dioxide (二氧化碳) into sugar. This sugar is the food for the tree. It is also busy that it covers up all of the other colors in the leaf.
When the weather grows colder in autumn, there is less light and water for trees. The trees will have a rest and get ready for winter. They’ve made enough food in summer! The leaves no longer need water to make food.
Without the water, the green chlorophyll starts to go away. The other colors in the leaf - the yellow xanthophylls and the orange carotene-come out. So the leaves don’t really “turn” a certain color -they just lose their green!
But how about the red, purple and green leaves? The leaves look red or purple because they have some sugar in them. They “steal” some food from the tree! The green leaves are from the evergreen trees (常青树). Their leaves don’t lose water in winter. So, the green chlorophyll doesn’t go away.
1. The leaves of trees in autumn turn yellow because there is ______.
A. not enough sunlight. B. no sugar C. no water D. no chlorophyll working
2. The little color “bags” refer to _____
A. green, yellow and orange B. chlorophyll, carotene and xanthophylls
C. carbon dioxide D. sunlight and water
3. The third paragraph (段) mainly shows us _________.
A. what chlorophyll is B. how chlorophyll makes water.
C. sugar is food for trees D. how photosynthesis (光合作用) works
4. Which of the following is NOT TRUE?
A. In summer trees begin to shut down their food-making factories.
B. When autumn and winter come, the days get shorter and shorter.
C. During winter trees rest and live on the food they have stored.
D. In winter little “bags” are still in the leaves.
5. We can infer from the passage that ______.
A. water in the tree leaves makes them green.
B. sugar in the tree leaves makes them yellow.
C. sunlight makes tree leaves green.
D. carbon dioxide makes tree leaves green.
1、C 2、B 3、D 4、A 5、A
In Chicago, a computerized system has been developed that controls(管理)traffic on the city’s 235 miles of seven expressways. Now one—a controller—can follow the movement of Chicago’s traffic by looking at a set of lights. The system uses electric sensors(感应器) that are built into each expressway, every half a mile. Several times a second, the computer receives information from each sensor and translates it into green, yellow or red lights on a map in the control room. A green light means traffic is moving forty-five miles an hour, yellow means thirty to forty-five miles an hour, and red means heavy traffic—cars standing still or moving less than thirty miles an hour.
“See that red light near Austin Avenue?”the controller asked a visitor.“That’s a repair truck fixing the road, and the traffic has to go around it.”At the Roosevelt Road entrance to the expressway, the light kept changing from green to red and back to green again.“A lot of trucks get on the expressway there,”the controller explained.“They can’t speed up as fast as cars.”The sensors show immediately where an accident or a stopped car is blocking the tr
affic, and a truck is sent by radio to clear the road. The system has lowered the number of accidents by 18 percent. There are now 1.4 deaths on Chicago’s expressway for each one hundred million miles traveled, while in other parts of the county there are 2.6.
Traffic experts say that the Chicago system is the “coming thing”.Systems like Chicago’s are already in use on some expressways in Los Angeles and Houston.“Chicago has taken the lead,”said New York City’s traffic director and he added,“Chicago’s a good example.”
根据短文内容，选择最佳答案，并在答题卡上按要求作答。
【小题1】The passage is mainly about ________ on expressways in Chicago.
| A．the traffic control system | B．the movement of the traffic |
| C．the electric sensors | D．the traffic lights |
| A．the red light appears | B．the red light turns yellow |
| C．the yellow light appears | D．the green light turns red |
| A．some visitors are traveling on the expressway |
| B．there is no heavy traffic on Chicago’s expressways |
| C．the traffic on Chicago’s expressways is well managed |
| D．the number of accidents in the US has dropped by 18% |
| A．the red light | B．the truck that needs repairing |
| C．the traffic | D．the truck that is fixing the road |
| A．giving reasons and results | B．giving examples and explaining them |
| C．describing what he thinks | D．asking and answering questions |
The Dragon Boat festival is very popular in China, it usually comes in May or June. On that day, people eat a special food--- rice dumplings. It is known as dragon-boat racing. Dragon-boat racing is the most popular activity during the festival. A dragon boat looks like a dragon, and is painted in red, white, yellow or black. Usually, a dragon boat is 20 to 40 metres long, and needs 20 people to row. Boatmen row the boat in cadence (节奏) with the drumbeats(鼓点), and a man in the front of the boat waves a small flag to help coordinate(使动作协调) the rowing.
Dragon-boat racing becomes a popular activity in South China. International(国际的) dragon-boat racing is held in Guangzhou and Hong Kong every year.
【小题1】Which is the most popular activity during the Dragon Boat Festival ?
| A．Eat rice dumplings | B．trick or treat |
| C．Pumpkin lantern | D．Dragon-Boat racing |
| A．20 | B．40 | C．60 | D．30 |
| A．Guangxi and Guangzhou |
| B．Guangzhou and Fujian |
| C．Guangzhou and Hong Kong |
| D．Hong Kong and Guangxi |
| A．South China |
| B．Dragon-boat racing |
| C．how to row the boat |
| D．the Dragon Boat Festival |
任务性阅读
先阅读(A)、(B)两篇短文，然后根据题目要求及所给语境完成下列四项任务。
|
certain we confident something communication |
How can we practice our spoken English ? The first and the most important thing is to believe yourself . You should always be full of 1 . You should often encourage yourself. “Come on , don’t be afraid !” You should never lose heart and never give up.
Maybe you are afraid of losing face, but you should think since we are students and we are learning, there is no need to worry about 2 . We must always be active in practice. We should 3 with our classmates as often as possible in English. We must know that the main way to study English is that we should make 4 understood. We should believe that native speakers will not laugh at us, instead they will encourage us. So if we are brave enough, we’ll 5 make much progress in our spoken English. Don’t be shy or afraid! Just have a try.
(B)
People started wearing clothes to protect themselves from the sun, wind, rain and cold. People said that many years ago the first kind of clothes were made of animal skins. Today we use different materials.
But clothes do more than keep us warm. Our clothes can also tell about who we are, our culture, life and hobbies. For example, if we like to wear yellow or pink clothes, we are usually active and easy--going. If we like black and blue, we may be quiet people. As a middle school student, we often wear the school clothes. Someone who works in a bank may wear a suit every day.
1.用方框中所给词的适当形式填空，使文章通顺、连贯、合理。（每空一词，每词限用一次）
1.__________2 .__________ 3.__________4.__________5.__________
2.根据英文释义及首字母提示，拼写单词。
6. c__________ education, area, literature and so on
7. a__________ full of action
3.同义句转换，每空一词。
People said that many years ago the first kind of clothes were made of animal skins.
It 8._________9._________ that many years ago the first kind of clothes were made of animal skins.
4.根据短文内容简答问题。
10. If someone likes wearing black and blue, what kind of person is he?
______________________.