It's hard to track the blue whale, which has almost been killed off by commercial whaling. Attaching radio devices to it is difficult and visual sightings are too unreliable to give real insight into its behavior. So biologists were delighted early this year when, with the help of the US Navy, they are able to track a particular blue whale for 43 days recording its sounds. This was possible because of the Navy's former top secret system of underwater listening devices across the oceans. Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies. Earth scientists announced at a news conference recently that they had used the system for closely observing a deep-sea volcanic eruption for the first time and that they planned similar studies. Other scientists have proposed to use the network for tracking ocean currents and measuring changes in the ocean and global temperatures. Different layers of ocean water can act as channels for sounds focusing them in the same way a stethoscope does when it carries faint noises from a patient's chest to a doctor's ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles. The deep-sea listening system makes use of _ . A) the ability of sound to travel at high speed B) the top-level technology of focusing sounds under water C) the unique characteristic of layers of ocean water in carrying sound D) low-frequency sounds traveling across different layers of water
C
(Question)
On April 1st, Mike decided to fool his friends. At lunch time he said to Tom, "I think we're going to have a test this afternoon." "Test?" said Tom, "Really?" "Yes, it's quite true," said Mike. "When I was passing by Mr. Green's room, he was talking with another teacher about the test. Tell John, Rose and Joan about it." Later Tom told them about the test. Soon almost all the students knew about it. "How foolish they are!" he thought. When class began, Mr. Green said, "Class, we're going to have a test today." Mike was surprised. The test was too hard for him. After class, all his classmates thanked him very much. But he could only smile. "How foolish I was !"he thought. It really was April Fools' Day for Mike. _ his classmates believe him before class. A) Almost all B) None of C) Only a few D) Some of
(Answer)
A
Ques: Dana Cummings was in his thirties before he first went surfing. But, even more interesting is that Dana Cummings chose to learn the sport after losing a leg in a car accident. Now, nine years later, he helps other disabled people learn how to ride the waves in AmpSurf. On the coast of Maine, he is working with 27-year-old Matthew Fish, who is partly blind. Cummings takes hold of Fish and leads him into the ocean. The surfboard floats next to them. Fish lies on the surfboard. He tries to stand up on it. After a few attempts he is up and riding all the way back to land. "That was exciting," Fish says. A car accident in 2002 took Dana Cummings' leg. He says the crash changed him more than just physically. "Losing my leg made me realize how precious life is and get off the couch and start living. I do more things now than I ever did before. Next week I am going to compete in a contest in Hawaii," Dana says. One year later Dana Cummings formed AmpSurf. AmpSurf is a group that volunteers to hold surfing classes and events for people with all kinds of disabilities. Recently, AmpSurf took its training programs to the East Coast. Eleven students attended the class in Maine. They came from all over the northeastern United States. Dana Cummings thinks AmpSurf can change the way a disabled person thinks. "Most people with disabilities consider himself or herself unlucky and useless, but we want them to see what they can do. Who cares you lose your leg or you are blind, whatever? Have fun. Just enjoy life. Take the most advantage of _ you can," Dana says. According to Dana Cummings, AmpSurf can _ . A) ease the physical pain of the disabled B) help the disabled learn to get used to their life C) change the attitude of the disabled towards life D) make the disabled pay more attention to their disabilities
Ans: C
(Q).
Fire fighting is a serous matter, knowing what to do during a fire can save people's lives. It is important to know the ways you can use and show them to everyone else in the family, such as stairways and emergency exits, but not elevators. From the lower floors of building, escape through windows is possible. Learn the best way to get out from a window with the least chance of serious injury. The second floor window is usually not very high from the ground. An average person, hanging by the fingertips will have a drop of about 6 feet to the ground. It is about twice the height of an average man. Of course, it is safer to jump a short way down than to stay in a burning building. Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure you get fresh air rather than smoke that may have leaked into the room. On the second or third floor, the best windows for escape are those which open onto a roof. From the roof a person can drop to the ground more safely. Dropping onto cement might end in injury. Bushes and trees can help you to have a soft landing. The writer suggests that _ A) breathing in smoke might be harmful B) smoke will enter the room through an open window C) fresh air can't reach the second floor window D) to keep you head low will help you to escape a fire
(A).
B
Ques:Two of the hardest things to accomplish in this world are to acquire wealth by honest effort and, having gained it, to learn how to use it properly. Recently 1 walked into the locker room of a rather well-known golf club after finishing a round.It was in the late afternoon and most of the members had left for their homes. But a half-dozen or so men past middle age were still seated at tables talking aimlessly and drinking more than was good for them. These same men can be found there day after day.and,strangely enough,each one of these men had been a man of affairs and wealth,successful in business and respected in the community.If material prosperity were the chief necessity for happiness, then each one should have been happy. Yet,it seemed to me,something very important was missing,else there would not have been the constant effort to escape the realities of life through scotch and soda. They knew, each one of them,that their productivity had ceased .When a fruit tree ceases to bear its fruit,it is dying.And it is even so with man. What 1s the answer to a long and happy existence in this world of ours? I think I found it long ago in a passage from the book of Genesis which caught my eye while I was looking through my Bible. The words were few,but they became memorably impressed on my mind:"In the sweat of the face shall you eat the bread." To me,that has been a challenge from my earliest recollections (memories).In fact,the battle of life,of existence,is a challenge to everyone.The immortal words of St.Paul,too,have been and always will be a great inspiration to me.At the end of the road 1 want to be able to feel that I have fought a good fight,I have finished the course,I have kept the faith. We learn from the passage that the author _ . A) was a wealthy person in the community B) held.a positive attitude towards an active life C) was fond of associating with celebrities D) kept a secret of the reason why he was so impressed

Ans:
B