Dad was not only my best friend, but my compass (指南针).While he was alive, he ____ me with his actions and advice. He taught me one important ____:“Believe in yourself.”

If there was one phrase my dad ____ liked to hear, it was “I can't.” He did not have chance to finish high school and ____ two jobs to support his large family, ____ he never complained. Through self-education and years of hard work, my dad became an excellent journalist.

When I was in high school, I had a ____ time with math. He tried to help me, but I ____ struggled. So my math teacher suggested I meet with him at 7:00 each morning before school for ____ help. I told Dad, “That's ____! I'm tired! I can't do that!” He replied, “You're doing it. I'll send you to school.” Every morning at 6:45, we'd leave the ____.Despite (尽管) working 12 hours every day, Dad never once ____ driving me to school.

After months of ____, I was facing the final exam. I was so ____.On the day of the final, my dad hugged me and said, “Luke, ____ yourself. You can do it.” His words made me realize I needed to trust in my ____ and in the hours of work I'd ____.When I got my ____ proudly, the first person I called was my father. He cried, “Yes! You deserved it!”

Even now, whenever I ____ that a task is too much for me, I think back to that exam. No matter how ____something is, if you're willing to work, you can succeed. I'm forever ____ to Dad for that lesson.

1.A. understood B.forgave C.guided D.impressed

2.A. history B.lesson C.skill D.language

3.A. always B.almost C.ever D.never

4.A. took B.lost C.left D.finished

5.A. so B.or C.but D.and

6.A. good B.free C.terrible D.short

7.A. still B.nearly C.hardly D.probably

8.A. real B.practical C.immediate D.extra

9.A. wonderful B.crazy C.expensive D.necessary

10.A. house B.school C.office D.farm

11.A. suggested B.risked C.enjoyed D.missed

12.A. meeting B.testing C.learning D.interviewing

13.A. excited B.nervous C.happy D.shocked

14.A. stand for B.hold back C.believe in D.look after

15.A. teacher B.luck C.time D.ability

16.A. wasted B.ignored C.picked up D.put in

17.A. answer B.grade C.pay D.gift

18.A. hope B.forget C.worry D.promise

19.A. different B.important C.hard D.interesting

20.A. grateful B.sorry C.polite D.useful

For centuries, medical pioneers have refined a variety of methods and medicines to treat sickness, injury, and disability, enabling people to live longer and healthier lives.

“A salamander (a small lizard-like animal) can grow back its leg. Why can't a human do the same?” asked Peruvian-born surgeon Dr. Anthony Atala in a recent interview. The question, a reference to work aiming to grow new limbs for wounded soldiers, captures the inventive spirit of regenerative medicine. This innovative field seeks to provide patients with replacement body parts.

These parts are not made of steel; they are the real things --- living cells, tissue, and even organs.

Regenerative medicine is still mostly experimental, with clinical applications limited to procedures such as growing sheets of skin on burns and wounds. One of its most significant advances took place in 1999,when a research group at North Carolina’s Wake Forest Institute for Regenerative Medicine conducted a successful organ replacement with a laboratory-grown bladder. Since then, the team, led by Dr. Atala, has continued to generate a variety of other tissues and organs 一 from kidneys to ears.

The field of regenerative medicine builds on work conducted in the early twentieth century with the first successful transplants of donated human soft tissue and bone. However, donor organs are not always the best option. First of all, they are in short supply, and many people die while waiting

for an available organ; in the United States alone, more than 100,000 people are waiting for organ transplants. Secondly, a patient’s body may ultimately reject the transplanted donor organ. An advantage of regenerative medicine is that the tissues are grown from a patient’s own cells and will not be rejected by the body’s immune system.

Today, several labs are working to create bioartificial body parts. Scientists at Columbia and Yale Universities have grown a jawbone and a lung. At the University of Minnesota, Doris Taylor has created a beating bioartificial rat heart. Dr. Atala’s medical team has reported long-term success with bioengineered bladders implanted into young patients with spina bifida (a birth defect that involves the incomplete development of the spinal cord). And at the University of Michigan, H. David Humes has created an artificial kidney.

So far, the kidney procedure has only been used successfully with sheep, but there is hope that one day similar kidney will be implantable in a human patient. The continuing research of scientists such as these may eventually make donor organs unnecessary and, as a result, significantly increase individuals’ chances of survival.

1.In the latest field of regenerative medicine, what are replacement parts made of?

A. Donated cells, tissues and organs.

B. Rejected cells, tissues and organs.

C. Cells, tissues and organs of one’s own.

D. Cells, tissues and organs made of steel.

2.What have scientists experimented successfully on for a bioartificial kidney?

A. Patients. B. Rats.

C. Sheep. D. Soldiers.

3.Why is regenerative medicine considered innovative?

A. It will provide patients with replacement soft tissues.

B. It will strengthen the human body’s immune system.

C. It will shorten the time patients waiting for a donated organ.

D. It will make patients live longer with bioartificial organs.

4.What is the writer’s attitude towards regenerative medicine?

A. Positive. B. Negative.

C. Doubtful. D. Reserved.

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