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Which animal has the fastest snapping jaw (颚)? If you're guessing a shark or perhaps a larger animal, you'll have to think smaller. The trapjaw ant, which lives in Central and South America, moves its mouth parts at 35 to 63 meters per second. Another way to think about this is that the ant's jaws close at 125 to 233 kilometers per hour. That's 2, 300 times faster than the blink of an eye. Scientists were able to measure the amazing jaw speed using highspeed video techniques. Sheila Patek, a biologist, says the key is that the jaws have a springy (有弹性的) system, which is critical in getting explosive (爆发性的) speeds. Consider a bow and arrow. If you try to throw an arrow with your arm, it won't go very far. If you use a bow, elastic energy stored in the bow is released almost instantly when you release the arrow with your finger or a latch. The combination of the springy bow and latch mechanism is what makes the arrow zoom through the air. Maybe even more amazing than how fast these ants grab food or even enemies is how they use this same energy to move. As the ant closes its jaws, it uses them to push off the ground—all faster than the eye can see without slow motion video. A snap of the jaw can send an ant up to 8.3 centimeters into the air. That's like someone who is 1.7 meters jumping 13 meters high! Not only can they quickly escape from enemies, but often a group of ants will start jumping all at once. It would be hard for their enemies to grab just one. People have suspected the ants used their jaws to jump for over a century, but could only prove it with today's modern video equipment. 1.The fast speed of the trapjaw ant's jaw lies in ________.
2.The passage uses “a bow and arrow” as an example to show ________.
3.Which of the following may amaze the scientists most?
4.According to the passage, the trapjaw ants' jaws keep them safe because ________.
How to improve our life? Many people think that they have to accept whatever life throws at them. They'll say，“my destiny(命运). I cannot change it. ” Of course not! You don't have to suffer needlessly. Your life depends on you, not on any other external(外部的) factor. I know a woman who says she just accepts what life gives her because she has done everything she can to improve it. Guess what her lifestyle is. She wakes up in the morning, goes to work, comes back home, relaxes, chats with people, watches TV, and then goes to sleep. Next day, the same routine cycle follows. Huh! Is this what she calls “doing her best”？ She believes she has tried her best and just accepts for her heart that this is the life that has been intended for her, and that her luck can only change if God wills it. She hasn't realized that we have to do our share of making the effort to live the life of our dreams. Remember that you harvest what you sow. You have to get off the sofa, get your eyes off the TV screen, get your hands off the phone(unless it contributes to your success), and get your mind and body to work! Don't expect your luck to change, unless you do something about it. If something goes wrong, don't just regard it as a temporary setback; instead, learn your lesson, make the most of the situation, and do something to solve the problem. It's not enough to think positively; you also have to act positively. If someone's life is in trouble, do you just hope and pray that things will turn out fine? Of course not! You get to do anything you can to save the person. So it is with your own life. It is not enough to hope for the best, but you have to do your best. In other words, don't just stand(or sit) there, do something to improve your life. 1.According to the woman mentioned in Para. 3, her life ________.
2.What does the author think of the woman's life?
3.Which of the following statements is the author's opinion?
4.In Para. 5, the author emphasized the importance of ________.
Early one morning the subinspector at a station at the other end of the town rang me. An elephant was damaging the town. Would I please come and do something about it? I did not know what I could do, but I got onto a horse and started out. I took my gun, maybe too small to kill an elephant, but I thought the noise might scare him. Various local people stopped me on the way and told me about the elephant's doings. It was not, of course, a wild elephant, but a tame one. It had been chained up but last night it had broken its chain and escaped. Its owner, had set out to run after it, but had taken the wrong direction. He was now twelve hours' journey away, and in the morning the elephant had suddenly appeared in the town. It had already destroyed somebody's bamboo hut (棚屋), killed a cow and turned over fruitstalls. I came round the hut and saw a man's dead body sprawling in the mud. He was an Indian, and he could not have been dead many minutes. The people said that the elephant caught him with its trunk, put its foot on his back and grounded him into the earth. This was the rainy season and he was lying on his stomach in the soft mud, the__peacebreaker standing beside, looking innocent. As I lifted my gun, I hesitated a few seconds. Then I fired. That was a shot that did for him. You could see the pain of it knock the last strength from his legs. But in falling he seemed for a moment to rise, his trunk reaching skyward like a tree. He trumpeted, for the first and only time. And then down he came, with a crash that shook the ground. 1.Which of the following statements about the author is TRUE?
2.The elephant made so much trouble because ________.
3.The underlined words “the peacebreaker” in Paragraph 4 refer to ________.
4.It can be inferred that the author felt ________ when he shot the elephant.
About a week ago, my 4yearold cousin and I were playing basketball at our local park. The__31__was warm, and many other children were outside__32__. As we played, I noticed a small group of boys__33__a smaller, skinnier, and possibly younger boy. They were calling him names and__34__pushed him to the ground and__35__dirt in his face. When I saw that, I grabbed my__36__by the hand and walked over to the__37__. I stepped__38__them and the younger boy, and asked them__39__what this boy had done deserved__40__they were doing to him. They all__41__silently for a moment, and then the most amazing thing __42__：one of the boys who hadn't said anything since I__43__stepped around the younger boy and helped him off the__44__and then apologized. He offered to let him play with them，__45__the boy quietly said “thank you” and refused, and then left there. As I looked around, I__46__that there were dozens of other people at the park—some of them were__47__with children of their own—but no one else had stopped to help this boy. I felt__48__that the one of the boys was brave enough to stand up against his friends to help someone__49__， but I felt sad that no one else had even taken a second__50__. I couldn't help but think that those parents at the park would want someone to help their child in that situation, and yet they did nothing but stood by.
We all know that, __________, the situation will get worse.
—Can I join the club, Dad? —You can when you _____ a bit older.
If you are in any doubt as to _____ you should be doing these exercises, consult your doctor.
—When can I come for the photos? I need them tomorrow afternoon． —They_______ be ready by 12：00．
Was it _____ she heard with her ears ____ really made her frightened?
Beneath our feet _____ that our life depends on for food and clothing.
We must treasure every minute because _____ time is _____ forever.
---If I had time, I would go shopping with you. ---But you___ too busy.
Some companies are reported to have stopped production, having ________ working capital.
John was very upset because he was ________ by the police with breaking the law.
In our daily life，everyone fails every now and then. It is how you ________ that makes a difference.
All of us didn't notice Tom come into the classroom because the light happened to ________ at that time.
“Neal, listen，” she said, looking straight at him. “I ask you not to get ________ in this kind of matter. It's none of your business.”
He ignored the neighbor's request that ________ less noise at night.
There are a great number of natural resources in the desert, which remain to be ________.
Everything ________ into consideration, they thought the car was good enough though it was heavy on oil.
The man is ________ a serious nervous breakdown because he is unable to deal with pressure from daily life.
Jim is fond of his present job. He must get a real ________ out of his work.
—I really don't know what I ________yesterday without the bike you lent me. —Glad to have been some help to you.
Here was a nice little present for everyone, with a suitable poem ________ to it.
—You didn't wait for Mr. Smith last night, did you? —Yes, but we ________. He didn't return home at all.
I remember a _____ famous scientist said that we should believe in ourselves first of all.
The Columbia has finished the task in the International Space Station and is reported to come back to the earth tomorrow, or to be more _____ , at 3:32p.m. local time.
--- Susan _____Catherine so much in the way she talks. --- Of course. She is Catherine’s daughter.
Do you know which president of the USA _____ slavery?
Don’t play_____ trick on him. He is not in_____ mood for fun at the moment.
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