—No,          invited to.

—        .

         A man lived at the foot of a hill. For a long time, he heard of tales of the other side of the hill—stories of rich land,  1 weather and beautiful scenery.

         One day, he was  2 life in his hometown and thought it was  3 to improve it, so he packed his bags, left his home and started climbing the hill,   4 to live a better life.

         The climb was very 5.The man had to stop to rest many times. At some 6 ， the hill was very steep(陡峭的) indeed, and he almost wanted to  7. But his dream of a better life 8  him going.

         One afternoon, the man came to another steep part of the hill. And at the top stood some thick plants. The same 9 had happened to him many times before.  10  this time it was a little hard to get it over, he surely was able to do it.

         11 ， the man was too tired after all those days of   12 and pushing through high plants. He was 13 that he still had no results to show, no fruit to enjoy. He just didn't want to 14  any more. He said to himself, “Maybe life on the other side of the hill is not like what the   15  told. My old home isn't that  16 anyway.” He finally made his decision,  17  and set off for his home.

         Actually the man didn't know that 18 he climbed over that slope (斜坡), he could see the other side of the hill and all he had heard about that place was  19. The man had already done the hard part, but he  20  to stop trying when things were going to get much better.

       British English is the language spoken in Britain. American English, also known as United States English or US English, is a set of dialects of the English language        (use) mostly in the United States. Vocabulary is a major        (different) between American English and British English at times. Because of        widespread usage of American English, many British people are starting to use some American words to take the place of some of their British       . So a lorry is becoming a truck. There are many other words        are being replaced as well. There are also times        the same words have completely different meanings in both forms of English. In British English a biscuit is similar        a cookie, but in American English it is more like a dinner roll. Sometimes British people pronounce their numbers differently. They enjoy        (add) the word “and” between the numbers. For example, American English speakers usually say 107 one hundred seven, while most British English speakers say one hundred and seven.        is interesting that many people who speak British English admire American accents. At the same time, many people who speak American English        (simple) love British accents.

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. That's a move similar to what a Texas A& M University researcher has 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, 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 and reptiles will become extinct over the next 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 cert ainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the lead ers 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.”

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