Taiji boxing is good health, so the old man began to practise it ten years ago and now he is good it. A.for; to B. to; for C. for; at D. at; for 题目和参考答案——青夏教育精英家教网—

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75. Taiji boxing is good _____ health, so the old man began to practise it ten years ago and now he is good _____ it.

A.for; to B. to; for C. for; at D. at; for

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Having worked abroad for five years, he _________ much experience in dealing with international affairs.

A. contributed B. found C. accumulated D. collected

With only about 1, 000 pandas left in the world, China is desperately trying to clone(克隆) the animal and save the endangered species(物种). That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called “Noah’s Ark”.

Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.

It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.

This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.

The entire procedure could take from three to five years to complete.

“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog.

“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”

69. According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.

A. available panda eggs B. host animals

C. qualified researchers D. enough money

70. The best title for the passage may be _______.

A. China’s Success in Pandas Cloning

B. The First Cloned Panda in the World

C. Exploring the Possibility to Clone Pandas

D. China —the Native Place of Pandas Forever

71. From the passage we know that _______.

A. Kraemer and his team have succeeded in cloning a dog

B. scientists try to implant a panda’s egg into a rabbit

C. Kraemer will work with Chinese scientists in clone researches

D. about two thousand of species will probably die out in a century

19. This kind of desk can be ________ to the height you need, which makes it very popular.

A. adopted B. adjusted C. referred D. Designed

84. It is theability to do the job _____ matters not where you come from or what you are.

A. one　　　　 B.that C. what D. It

After he left college, he was employed in an international company and _______ there ever since.

A. worked B. has worked C. had worked D. was working

25. —Your mother becomes more and more forgetful.

— Yes. She searched for her cell phone for a whole day last Sunday but it ______ in her coat

pocket the next day.

turned out B. turned on C. turned over D. turned up

A salty diet may increase the risk of stomach cancer ________ 10 percent, South Korean researchers found in a study of more than 2 million people.

A. at B. to C. by D. for

---- Do you know why the sun looks much bigger on the horizon?

---- Well, well, ______. I’ ve never read about that.

A. you really have me there B. that depends

C. I can’t tell you D. there is some doubt

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