从每小题的A、B、C、D四个选项中，找出所给单词的正确读音，并在答
题卡上将该选项涂黑。

阅读下面短文，根据以下要求：1）汉语提示；2）首字母提示；3）语境提示，在每个空格内填入一个适当的英语单词，所填单词要求意义准确、拼写正确。将答案写到答题卡相应的位置上。

These days the severe weather in Beijing has aroused public concern.

In areas    1.  the ground can be seen, the landscape is yellow or gray. The citizens surveyed complained

   2.   the loose soil and dust blanketed streets, removing the  3.    (便利)of travelling around. When it came to outdoor activities, they had no choice   4.    to wear face masks to protect   5.     . The Weather Board sent an a1arm, w   6.   that the conditions were most likely to last until  7.    (星期三). Faced with this emergency, the government has taken i    8.   measures like shutting down polluting factories.“That’s f    9.  from enough.,”an officia1 said,“We must not any longer seek rapid growth   10.   the expense of environment! If we don’t get started from now on, we will have to pay a heavier price!”

This year some twenty-three hundred teenagers  (young people aged from13~19)from all over the world will spend about ten months in U.S. homes. They will attend U.S. schools, meet U.S. teenagers, and form impressions of the real America. At the same time, about thirteen hundred American teenagers will go to other countries to learn new languages and gain a new understanding of the rest of the world.

Here is a two-way student exchange in action. Fred, nineteen, spent last year in Germany with George’s family. In turn, George’s son Mike spent a year in Fred’s home in America.

Fred, a lively young man, knew little German when he arrived, but after two months’ study the language began to come to him. School was completely different from what he had expected—much harder. Students rose respectfully when the teacher entered the room. They took fourteen subjects instead of the six that are usual in the United States. There were almost no outside activities.

Family life, too, was different. The father’s word was law, and all activities were around the family rather than the individual. Fred found the food too simple at first. Also, he missed having a car.

“Back home, you pick up some friends in a car and go out and have a good time. In Germany, you walk, but you soon learn to like it.”

At the same time, in America, Mike, a friendly German boy, was also forming his idea. “I suppose I should criticize(批评)American schools,” he said. “It is far too easy by our level. But I have to say that I like it very much. In Germany we do nothing but study. Here we take part in many outside activities. I think that maybe your schools are better in training for citizens. There ought to be some middle ground between the two.”

1.This year ________teenagers will take part in the exchange programme between America and other countries.

A．twenty-three hundred                   B．thirteen hundred

C．over three thousand                     D．less than two thousand

2.The whole exchange programme is mainly to__________.

A．help teenagers in other countries know the real America

B．send students in America to travel in Germany

C．let students learn something about other countries

D．have teenagers learn new languages

3.Fred and Mike agree that__________.

A．America food tasted better than German food

B．German schools were harder than American schools

C．Americans and Germans were both friendly

D．There were more cars on the streets in America

4.What is particular in American schools is that________.

A．there is some middle ground between the two teaching buildings

B．there are a lot of after-school activities

C．students usually take fourteen subjects in all

D．students go out side to enjoy themselves in a car

We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans,  killing wildlife and getting dumped in landfills where they take up to 1000 years to decompose. Researchers have been unsuccessfully looking for a solution.

The 16-­year ­old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute,

has discovered a way to make plastic bags degrade(分解) in as few as 3 months, a finding that won him first prize at the Canada－Wide Science Fair, a $10 000 prize, a $20 000 scholarship, and a chance to revolutionize a major environmental issue.

Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms (微生物). If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.

With this goal in mind, he ground plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth. Then he added the plastic powder and let the microbes work their magic for 3 months. Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control. Sure enough, the plastic exposed to the live bacteria was 17% lighter than the control after six weeks.

The inputs are cheap: maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.

“Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me. One day, I got tired of it and I wanted to know what other people are doing with these plastic bags. The answer: not much. So I decided to do something myself.” said Daniel Burd.

1.Daniel Burd won first prize at the Canada－Wide Science Fair because________.

A. he found a new kind of microorganism

B. he contributed much to environmental protection

C. he found a way to degrade plastics in shorter time 

D. he could encourage microbes growth in an easier way

2.Daniel Burd exposed one plastic sample to dead bacteria to ________.

A. make the live bacteria work better             

B. test how effective his method was

C. know which bacteria worked faster        

D. control the temperature in the process

3.Maintaining the required temperature takes little energy because ________.

A. plastics can get hot easily

B. microbes can produce heat themselves

C. much carbon dioxide is produced

D. the temperature can be controlled

4.Daniel Burd got his idea from ________.

A. his school textbook           B. the failure of researchers

C. his everyday work            D. the practice of other people

Bungee jumping is an activity about jumping from a tall structure while connected to a large elastic cord(有弹性的绳子). The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air balloon or helicopter, that has the ability to stay over one place on the ground; fixed-wing aircraft are unsuitable because they only stay high when moving quickly forward.

When the person jumps, the cord stretches to absorb (吸收)the energy of the fall, then the jumper flies upwards again as the cord jumps back. The jumper oscillates(摆动)up and down until all the energy is used up.

The word bungee first appeared around 1930 and was the name for a rubber eraser. The first modern bungee jumps were made on 1 April 1979 from the 250-foot Clifton Suspension Bridge in Bristol, by David Kirk, Chris Baker and Alan Weston of the Dangerous Sports Club. The jumpers continued with jumps in the US from the Golden Gate and Royal Gorge bridges, spreading the concept worldwide. By 1982 they were jumping from mobile cranes and hot-air balloons. Later they put on commercial(商业的)shows, which began in 1986.

As with any sport, injuries can still happen, and there have been deaths. A relatively common mistake in the cases that may cause death is to use a cord that is too long. The cord should be fully shorter than the height of the jumping place to allow it room to jumper either starts to slow down or keeps speeding up depending upon the speed of falling.

1.Which of the following is NOT suitable for bungee jumping?

A．The fixed-wing aircraft                   B．The helicopter

C．The hot-air balloon                      D．The mobile crane

2.In the second paragraph, the author tells_________________.

A．who suits bungee jumping

B．the principle of bungee jumping

C．the material used for bungee jumping

D．the danger of bungee jumping

3.According to the last paragraph, the safety of the jumpers depends mainly on________.

A．the weight of the jumper

B．the height of the jumping place

C．the length of the cord

D．the speed of the falling

4.The purpose of writing this passage is to__________.

A．teach people how to carry out a bungee jumping

B．remind people of the danger of bungee jumping

C．advise people not to take the risk of bungee jumping

D．introduce some knowledge about bungee jumping