Which animal has the fastest snapping jaw (突然合住的颚)? If you’re guessing a shark or perhaps a larger animal, you’ll have to think smaller. The trap-jaw 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 high-speed 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 freed almost immediately when you let go of the arrow with your finger. That’s exactly what really fast organisms are doing.

       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.

72. The fast speed of the trap-jaw ants’ jaws lies in ______.

A. their light bodies                            B. their springy systems

C. their living environment                     D. the length of their jaws

73. What does the passage use “a bow and arrow” as an example to show?

A. How an arrow gets so much energy to fly.       B. Why the trap-jaw ants have a springy system.

C. Why the trap-jaw ants’ jaws move so fast.       D. How a bow and arrow works.

74. Which of the following things may amaze the scientists most?

A. How high the ants can leap by using their jaws.

B. How quickly the trap-jaw ants can move on the ground.

C. How wonderfully the springy system in the trap-jaw ants’ jaws works.

D. How quickly the trap-jaw ants can grab food or enemies.

75. According to the passage, the trap-jaw ants’ jaws keep them safe because ______.

A. they can catch their enemies easily with their jaws

B. their jaws make them difficult to recognize

C. their jaws help them to find food easily

D. their jaws help them to escape from their enemies

       Close your eyes and think of someone who has hurt you. The offence may be severe or small but deeply painful. He may be a stranger — the driver who caused your accident or someone who took your child. More likely, it is someone close and trusted. It may even be yourself.

       Let all the anger and hurt you feel for that wrongdoer gradually come to the surface. Feel your heart beating quickly, your stomach churning (翻腾) and your thoughts racing in dark directions. OK, stop. Now, forgive the offender. Don’t just remember the bitterness, but wish him well and move on — whether he is sorry or not.

       Many researchers think forgiveness may be medicine for the body. They have shown that “forgiveness interventions (介入)” — often just a couple of short sessions in which the wounded are guided towards positive feelings for an offender — can reduce pain and depression and increase quality of life among the very ill.

       Like proper nutrition and exercise, forgiveness appears to be a behaviour that a patient can learn, exercise and repeat as needed to prevent disease and preserve health. But the new science worries many in mental health who fear that traumatised (精神受创伤的) patients face pressure to forgive when their desire to do so is not fully developed.

       While much of the early work on forgiveness has focused on forgiveness of others, scientists are turning up evidence that forgiving oneself may have a more powerful effect on overall health. “Sometimes people hurt us, and we move on, and it might fade,” says Loren Toussaint, a psychologist who with colleagues was the first to establish a long-term link between people’s health and their likeliness to forgive. However, Dr. Toussaint has been surprised to learn that those who hold onto self-blame may suffer more. As he says, “The human mind is sometimes an instrument of suffering.”

68. The first paragraph mainly wants to tell readers that ______.

A. it’s easy for us to remember who has hurt us      B. we may be hurt by any person

C. any offence is deeply painful                  D. to forgive others is to forgive ourselves

69. What does the underlined word “so” in the fourth paragraph refer to?

A. Forgiveness.     B. Treatment.          C. Health preservation.    D. Pain reduction.

70. According to Dr. Toussaint, which of the following may be the most useful thing for our health?

A. Self-blame.           B. Forgiving others.         C. Showing anger.            D. Forgiving ourselves.

71. What would be the best title for the passage?

A. Happiness keeps you away from diseases        B. Learn to treat yourself well

C. Forgive — and forget the doctor               D. How to forgive others

TALLAHASSEE, November 27 — Zach Bonner showed no sign of tiredness on Monday morning, as he spoke on the steps of the old State Capitol(州议会大厦), the end point of his 280-mile march from Tampa. The fourth-grader started walking to Tallahassee on Nov. 3rd to raise awareness about homeless children.

       At 8:30 am yesterday, Zach and his mother walked the final mile down Apalachee Parkway to the steps of the old Capitol with Zach’s 20-year-old sister, Kelley, and a group of volunteers. 

       “The hardest part was whenever it was pouring down rain,” said Zach, who turned 10 during his walk on Nov. 17th. “I just put on my rain suit and kept walking through it.”

       Zach got the idea for his walk about a year ago after watching a TV program about Mildred Norman Ryder, the “Peace Pilgrim(朝圣者)” who walked more than 25,000 miles for nearly three decades. But it was a law that Congress passed in August, declaring November as National Homeless Youth Awareness Month, that persuaded Zach to undertake his project.

       When he first announced his plans to his family, “I thought he was crazy,” said his mother, who walked nearly the entire way with her son. “That’s a long way to go ... He said, ‘I’ve got to do something big.’ Originally, he said he was going to go from Fort Lauderdale to Tallahassee. I said, ‘Well, maybe Tampa to Tallahassee might be a little easier.’”

       Zach’s project raised not only awareness of youth homelessness, but also about $25,000 in donations (捐款) and supplies. Corporate sponsors(社团赞助者)provided meals and other resources for Zach and his family, who spent nights in a donated RV (recreational vehicle). 

64. It can be inferred that Zach finished his 280-mile journey in ________. 

A. fourteen days       B. twenty-four days              C. twenty-eight days     D. thirty-two days 

65. According to the passage, Zach started his long walk from ________.

A. Tampa                B. Tallahassee            C. Fort Lauderdale       D. Orlando     

66. When did Zach determine to make the long journey? 

A. After he watched a program about Mildred Norman Ryder. 

B. After he finished a walk from Fort Lauderdale to Tallahassee.

C. After a law on awareness of homeless youths was passed. 

D. After his mother suggested he should do something big.

67. How did Zach’s mother probably feel when hearing Zach’s plans at first?

A. Excited and interested.                        B. Satisfied and pleased.

C. Disappointed and angry.                      D. Surprised and worried.  

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