(It is) (important) that she (goes to) see the doctor (immediately).（　）

A:It is B:important C:goes to D:immediately

With the price of oil (goes up), the economy of (oil-producing) countries is (expanding) (at a high rate).

A:goes up B:oil-producing C:expanding D:at a high rate

A little airplane has given new meaning to the term "going hyper. "
The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed of seven times the speed of sound. That’s about 5,000 miles per hour. At this speed, you’d get around the world -- flying along the equator (赤道) -- in less than 5 hours.
The Hyper-X is an unmanned,experimental aircraft just 12 feet long. It achieves hypersonic (超音速的) speed using a special sort of engine known as a scramjet. It may sound like something from a comic book,but engineers have been experimenting with scramjets since the 1960s.
For an engine to burn fuel and produce energy, it needs oxygen. A jet engine, like those on passenger airplanes, gets oxygen from the air. A rocket engine typically goes faster but has to carry its own supply of oxygen. A scramjet (紧急刹车) engine goes as fast as a rocket, but it doesn’t have to carry its own oxygen supply. A scramjet’s special design allows it to obtain oxygen from the air that flows through the engine. And it does so without letting the fast-moving air put out the combustion (燃烧) flames. However, a scramjet engine works properly only at speeds greater than five times the speed of sound. A booster rocket carried the Hyper-X to an altitude of about 100,000 feet for its test flight. The aircraft’s record-beating flight lasted just 11 seconds. Although the little plane’s self-powered flight lasted only 11 seconds, that brief journey on March 27 makes a major milestone on the way to a new breed of very fast airplanes, comments Werner J. A. Dahm of the University of Michigan in Ann Arbor. In the future, engineers predict, airplanes equipped with scramjet engines could transport cargo quickly and cheaply to the brink of space. Such hypersonic jets could potentially carry passengers anywhere in the world in just a few hours.
Out of the three experimental Hyper-X aircrafts built for NASA, only one is now left. The agency has plans for another 11-second hypersonic flight, this time at 10 times the speed of the sound.
What is NOT true about the scramjet engine

A:It goes slower than a rocket. B:It extracts oxygen from the air that flows through the engine. C:It works only at speeds greater than five times the speed of sound. D:It doesn’t carry its own oxygen supply.

{{B}}第二篇{{/B}}

What is NOT true about the scramjet engine?

A:It goes slower than a rocket. B:It extracts oxygen from the air that flows through the engine. C:It works only at speeds greater than five times the speed of sound. D:It doesn’t carry its own oxygen supply.

A little airplane has given new meaning to the term "going hyper."
The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed of seven times the speed of sound. That’s about 5,000 miles per hour. At this speed, you’d get around the world -- flying along the equator -- in less than 5 hours.
The Hyper-X is an unmanned, experimental aircraft just 12 feet long. It achieves hypersonic speed using a special sort of engine known as a scramjet. It may sound like something from a comic book, but engineers have been experimenting with scramjets since the 1960s.
For an engine to burn fuel and produce energy, it needs oxygen. A jet engine, like those on passenger airplanes, gets oxygen from the air. A rocket engine typically goes faster but has to carry its own supply of oxygen. A scramjet engine goes as fast as a rocket, but it doesn’t have to carry its own oxygen supply. A scramjet’s special design allows it to obtain oxygen from the air that flows through the engine. And it does so without letting the fast-moving air put out the combustion flames. However, a scramjet engine works properly only at speeds greater than five times the speed of sound. A booster rocket carried the Hyper-X to an altitude of about 100,000 feet for its test flight. The aircraft’s record-beating flight lasted just 11 seconds. Although the little plane’s self-powered flight lasted only 11 seconds, that brief journey on March 27 makes a major milestone on the way to a new breed of very fast airplanes, comments Werner J. A. Dahm of the University of Michigan in Ann Arbor. In the future, engineers predict, airplanes equipped with scramjet engines could transport cargo quickly and cheaply to the brink of space. Such hypersonic jets could potentially carry passengers anywhere in the world in just a few hours.
Out of the three experimental Hyper-X aircrafts built for NASA, only one is now left. The agency has plans for another 11-second hypersonic flight, this time at 10 times the speed of the sound.
What is NOT true about the scramjet engine

A:It goes slower than a rocket. B:It extracts oxygen from the air that flows through the engine. C:It works only at speeds greater than five times the speed of sound. D:It doesn’t carry its own oxygen supply.

Direction: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the ONE answer that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. Dogs are often 21 man’s best friend. For those who are blind, a dog is 22 than a friendly company. A dog is a pair of sharp eyes. A 23 dog guide gives blind people the 24 to move through the world safely and freely. A dog guide is also a best friend. 25 a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all 26 the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it 27 training and gets used to 28 around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school 29 whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 30 that pass the tests go into a training 31 . For the next four-to-six months, the dog learns everything 32 needs to become a dog 33 . The dog learns to stay focused. It learns to ignore food, smell, and other animals. It learns to remain 34 by such noises such 35 shouting or music from a passing ear radio. It learns to 36 commands like" right", "left" or" forward". The dog learns to stop before every curb and stairway and to 37 moving objects. In short, good dog guides learn to keep their 38 safe while they go about the everyday actions of life. A dog that 39 completed training will be 40 a master.

A:being B:be C:goes D:walk

Dogs are often【C1】______man’s best friend. For those who are blind, a dog is【C2】______than a friendly company. A dog is a pair of sharp eyes. A【C3】______dog guide gives blind people the【C4】______to move through the world safely and freely. A dog guide is also a best friend. 【C5】______a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all【C6】______the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog and its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it【C7】______training and gets used to【C8】______around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school【C9】______whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 【C10】______that pass the tests go into a training【C11】______ For the next four-to-six months, the dog learns everything【C12】______needs to become a dog 【C13】______The dog learns to stay focused. It learns to ignore food, smell and other animals. It learns to remain【C14】______by such noises such【C15】______shouting or music from a passing car radio. It learns to【C16】______commands like "right", " left" or " forward ". The dog learns to stop before every curb and stairway and to【C17】______moving objects. In short, good dog guides learn to keep their【C18】______safe while they go about the everyday actions of life. A dog that【C19】______completed training will be【C20】______a master.【C8】

A:being B:be C:goes D:walk

Direction: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the ONE answer that best fits into the passage. Then mark the corresponding letter on the Answer Sheet with a single line through the centre. Dogs are often 21 man’s best friend. For those who are blind, a dog is 22 than a friendly company. A dog is a pair of sharp eyes. A 23 dog guide gives blind people the 24 to move through the world safely and freely. A dog guide is also a best friend. 25 a working team of a dog and a person is not easy. There are no factories making thousands of dog guides a day. There are however, schools all 26 the country that train both blind people and the dogs they depend upon. The process of education is long for both the dog its human partner. A dog begins schooling as puppy. Around age of 8 weeks, the puppy is placed with a faster family. There it 27 training and gets used to 28 around people. When a dog is about a year old, it goes off to school for a series of tests. These tests help the school 29 whether the dog is likely to make a good guide. Dogs that fail the tests are placed in permanent homes. 30 that pass the tests go into a training 31 . For the next four-to-six months, the dog learns everything 32 needs to become a dog 33 . The dog learns to stay focused. It learns to ignore food, smell, and other animals. It learns to remain 34 by such noises such 35 shouting or music from a passing ear radio. It learns to 36 commands like" right", "left" or" forward". The dog learns to stop before every curb and stairway and to 37 moving objects. In short, good dog guides learn to keep their 38 safe while they go about the everyday actions of life. A dog that 39 completed training will be 40 a master.

A:being B:be C:goes D:walk