. Water, seems so simple and common, is what makes life possible. A. that B. as C. what D. which 题目和参考答案——青夏教育精英家教网—

题目内容

Water, _______ seems so simple and common, is what makes life possible.

A. that B. as C. what D. which

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The huge Florida wetland known as the Everglades is a slow-moving river 80 kilometres wide but only a few centimeters deep. People call the Everglades a “river of grass” because sawgrass covers most of it. Sawgrass is not really grass. It is a plant that has leaves edged with tiny sharp teeth that can easily cut through clothes—and skin!

Travel in the Everglades is difficult. You cannot walk through shallow water because the sawgrass will cut you. The water is too shallow for regular boats. So, we use an airboat. An airboat is a flat, open boat. Like an airplane, it has a big propeller to move it. The propeller is fixed on the rear of the boat. It makes a tremendous noise, but it does the job. The boat skims along the water’s surface. Although we can still get lost in an airboat, at least we are above the alligators(短吻鳄).

While hundreds of different kinds of animals live in the Everglades, the most famous is surely the alligator. Once endangered, alligators are now protected within Everglades National Park. Visitors are likely to see them both on land and in water.

For a long time, dangers have threatened the Everglades. Around 1900, some people felt this precious wetland should be drained (排干). They said it was just a big swamp and not good for anything. In the 1920s, there was a land boom in Florida. People wanted to build homes everywhere, including in the Everglades. They built canals, levees (防洪堤) , and other water systems that stopped the rivers flowing into the Everglades. Factories were built near rivers that flowed into the wetland. These factories dumped poisonous waste that damaged the Everglades ecosystem.

? People are now working to preserve the Everglades National Park for the future. Right now, one big problem is the paperbark tree. This tree is an invader from Australia.

Paperbark trees soak up a lot of water. In the early 1900s, people brought them to Florida because they thought they would help drain the Everglades. However, the invaders adapted too well. Paperbark trees have taken over hundreds of thousands of acres of the Everglades and killed other trees. Scientists are cutting down these invaders or spraying them with herbicides (除草剂) to kill them. ?

Which helps to explain why it is difficult to travel in Everglades?

A. Airboats may make a very big noise.

B. You may get lost when passing through.

C. Paperbark trees soak up too much water there.

D. Many different kinds of animals are to be protected.

Why do people use airboats instead of normal boats?

A. They have big propellers to move them faster than alligators.

B. The propeller makes loud noise so as to scare alligators.

C. Their flat bottom can skim along the water surface.

D. They can watch alligators without hurting them. ?

The following measures were taken to drain the Everglades except that people______. ?

A. built canals and levees to stop the rivers flowing into Everglades?

B. built factories near rivers that flowed into the wetland?

C. brought Paperbark to soak up water in Everglades?

D. are cutting down these Paperbark trees?

The underlined word "invader" probably means something______. ?

A. that moves in from another place B. that enters and takes control?

C. that has been brought in? D. that is in danger?

The sea has always interested man. From it he can get food, minerals, and treasure. For thousands of years, he could sail on it. But he could not go far beneath its surface.

Man wants to explore deep into the sea. However, he is not a fish. He must breathe air, so he can't stay under the water's surface for any length of time. To explore deep water, man faces even more dangers and problems.

A diver who wants to stay under water for more than a few minutes must breathe air or a special mixture of gases. He can wear a diving suit and have air pumped to him from above. He can carry a tank of air on his back and breathe through a nose and a mouthpiece. Water weighs 800 times as much as air. Tons of water pushes against a diver deep in the sea. His body is under great pressure.

When a diver is under great pressure, his blood takes in some of the gases he breathes. As he rises to surface, the water pressure becomes less. If the diver rises too quickly, the gases in his blood form bubbles. The diver is then suffering from the bends. The bends can cause a diver to double up in pain. They can even kill him.

1.On the whole, this passage is about ________.

A. special mixtures of gases in deep sea

B. the problems man faces in deep sea diving

C. air pressure under the surface of sea water

D. a kind of illness that man suffers in the sea

2.The passage does not say so, but it makes you think that ________.

A. deep divers should be in good health

B. divers explore the deep sea only for treasure

C. diving under the water too quickly causes a kind of illness

D. there is a special mixture of gases under the sea

3.From the passage we can see that ________.

A. the sea began to interest man a few years ago

B. man is not at home deep in the sea

C. all divers will get the bends sooner or later

D. the air in the sea water will kill a diver if he is not careful

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项

The sea has always interested man. From it they can get food, minerals, and treasure. __1.__ But he could not go far beneath its surface __2.__. However, he is not a fish. He must breathe air, so he can’t stay under the water’s surface for any length of time. To explore deep water, man faces even more dangers and problems. A diver who wants to stay under water for more than a few minutes must breathe air or a special mixture of gases __3.__. He can carry a tank of air on his back and breathe through a nose and mouth piece. Water weighs 800 times as much as air. Tons of water pushes against a diver deep in the sea _4.__. When a diver is under great pressure, his blood takes in some of the gases he breathes. As he rises to surface, the water pressure less. If the diver rises too quickly, the gases in his blood form bubbles (气泡). The diver is then suffering from the bends (潜水夫病).The bends can cause a diver to double up in pain __5.__ .

A. His body is under great pressure.

B. Scientists are trying to find more about the sea.

C. For thousands of years, he could sail on it.

D. They can even kill him.

E. He can wear a diving suit and have air pumped to him from above.

F. The water pressure can cause a diver to breathe with difficulty.

G. Man wants to explore deep into the sea.

About twenty of us had been fortunate enough to receive invitations to a film-studio(影棚)to take part in a crowd-scene. Although our "act" would last only for a short time, we could see quite a number of interesting things.

We all stood at the far end of the studio as workmen prepared the scene, setting up trees at the edge of a winding path. Very soon, bright lights were turned on and the big movie-camera was wheeled into position. The director shouted something to the camera operator and then went to speak to the two famous actors nearby. Since it was hot in the studio, it came as a surprise to us to see one of the actors put on a heavy overcoat and start walking along the path. A big fan began blowing tiny white feathers down on him, and soon the trees were covered in "snow". Two more fans were turned on, and a "strong wind" blew through the trees. The picture looked so real that it made us feel cold.

The next scene was a complete contrast (对比). The way it was filmed was quite unusual. Pictures in front taken on an island in the Pacific were shown on a glass screen (幕). An actor and actress stood of the scene so that they looked as if they were at the water’s edge on an island. By a simple trick like this, palm trees, sandy beaches, and blue, clear skies had been brought into the studio!

Since it was our turn next, we were left wondering what scene would be prepared for us. For a full three minutes in our lives we would be experiencing the excitement of being film "stars"!

1.Who is the author?

A．A cameraman.

B．A film director.

C．A crowd-scene actor.

D．A workman for scene setting.

2. What made the author feel cold?

A．The heavy snowfall.	B．The man-made scene.
C．The low temperature.	D．The film being shown.

3.What would happen in the "three minutes" mentioned in the last paragraph?

A．A new scene would be filmed.

B．More stars would act in the film.

C．The author would leave the studio.

D．The next scene would be prepared.

We all stood at the far end of the studio as workmen prepared the scene, setting up trees at the edge of a winding path. Very soon, bright lights were turned on and the big movie-camera was

wheeled into position. The director shouted something to the camera operator and then went to speak to the two famous actors nearby. Since it was hot in the studio, it came as a surprise to us to see one of the actors put on a heavy overcoat and start walking along the path. A big fan began blowing tiny white feathers down on him, and soon the trees were covered in "snow". Two more fans were turned on, and a "strong wind" blew through the trees. The picture looked so real that it made us feel cold.

Since it was our turn next, we were left wondering what scene would be prepared for us. For a full three minutes in our lives we would be experiencing the excitement of being film "stars"!

1.Who is the author?

A．A cameraman.

B．A film director.

C．A crowd-scene actor.

D．A workman for scene setting.

2.What made the author feel cold?

A．The heavy snowfall.

B．The man-made scene.

C．The low temperature.

D．The film being shown.

3.What would happen in the "three minutes" mentioned in the last paragraph?

A．A new scene would be filmed.

B．More stars would act in the film.

C．The author would leave the studio.

D．The next scene would be prepared.

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