Born in England in 1944, Ian Wilmut{#blank#}1{#/blank#}(know) as the leader of the research group than first cloned a female lamb {#blank#}2{#/blank#} (call) Dolly in 1996. Dolly became famous and pictures of her appeared on the {#blank#}3{#/blank#} (cover) of magazines all over the world. The {#blank#}4{#/blank#} (possible) of reproduction without a male and female being involved also made her the focus of a moral debate. For scientists, however, the cloning of dolly using the DNA of an adult cell was a breakthrough {#blank#}5{#/blank#}showed the cloning of special animals was possible.

    However,{#blank#}6{#/blank#}Wilmut think unlikely is human cloning. He says {#blank#}7{#/blank#} (undertake) the procedure with humans would require 29 surrogate（替代的）mothers and 300 eggs. Of those 29, 28 would be bound {#blank#}8{#/blank#}(experience) failure and suffer physically and emotionally. He says he is also concerned about the psychological and {#blank#}9{#/blank#}(society) consequences a cloned might have to go through. For these reasons, he is not{#blank#}10{#/blank#} favor of it.

    The Great Wall was listed as a World Heritage by UNESCO in 1987. Just like a dragon, it winds up and down across deserts, grasslands and mountains,{#blank#}1{#/blank#}( run) approximately 21,196 kilometers from east to west.

    The{#blank#}2{#/blank#}( construct) of the Great Wall was not that easy, {#blank#}3{#/blank#}drew heavily on the local resources for building materials. The walls were{#blank#}4{#/blank#}( original) built in the Spring & Autumn Period and the Warring States Period. Emperor Qin Shi Huang succeeded in his effort to have them joined together. Since then, the Great Wall{#blank#}5{#/blank#}( serve) as a monument of the Chinese nation throughout history.

    With {#blank#}6{#/blank#}history of about 2,700 years, some parts of the Great Wall are now {#blank#}7{#/blank#}ruins or have disappeared. However, the Great Wall of China is still one of the most appealing{#blank#}8{#/blank#}(attraction) all around the world owing to its historical significance. The best-known part of the Great Wall of China, Badaling, {#blank#}9{#/blank#}(locate) 43 miles northwest of Beijing, attracts thousands of national and foreign tourists every day.

    Today, the Great Wall{#blank#}10{#/blank#}(recognize) as one of the most important impressive architectural achievements in history.

    Arthur Robert Ashe Jr. was born on July 10, 1943 and died on February 6, 1993. He was the first African American player {#blank#}1{#/blank#} (take) part in the international sport of tennis at the highest level of the game.

    Arthur's father was the manager of a large park in Richmond, Virginia. Arthur {#blank#}2{#/blank#} (allow) to play in the park when he was seven years old. He was quite {#blank#}3{#/blank#} (energy). There was a swimming pool and many tennis courts in the park, {#blank#}4{#/blank#} Arthur spent a lot of time playing. He did well in sports, {#blank#}5{#/blank#} he had never tried to play tennis.

    Ronald Charity, {#blank#}6{#/blank#} famous tennis player then, noticed Arthur. Mr Charity asked Arthur {#blank#}7{#/blank#} he wanted to learn to play tennis. "I will, Mr Charity," Arthur answered {#blank#}8{#/blank#} (excite). Arthur learned very quickly. At the age of ten, Arthur competed in a tennis game. Many {#blank#}9{#/blank#} (old) and more experienced players came trying to win the prize, but Arthur beat them. He became known {#blank#}10{#/blank#} "the kid who could play tennis"．

    Arthur grew up to be one of the first successful African American tennis players. He played and won all over the world.

    One day, Nick invited his friends to supper. He was cooking some delicious food in the kitchen. Suddenly, he {#blank#}1{#/blank#} (find) that he had run out of salt. So Nick called to his son, "Go to the village and buy some salt, but pay a fair price for it: neither too much {#blank#}2{#/blank#}too little.

    His son looked surprised. "I can understand why I shouldn't pay too much, Father, but if I can pay less, {#blank#}3{#/blank#}not save a bit of money?

    "That would be a very {#blank#}4{#/blank#} (reason) thing to do in a big city, but it could destroy a small village like {#blank#}5{#/blank#} (us), Nick said.

    Nick's guests, {#blank#}6{#/blank#}had heard their conversation, asked why they should not buy salt more cheaply if they could. Nick replied, "The only reason a man would sell salt {#blank#}7{#/blank#}a lower price would be because he was desperate for money. And anyone who took advantage of that situation would be showing a lack of respect for the sweat and struggle of the man who worked very hard to produce it."

    "But such a small thing couldn't {#blank#}8{#/blank#} (possible) destroy a village."

    "In the beginning, there was only {#blank#}9{#/blank#}very small amount of unfairness in the world, but everyone added a little, always {#blank#}10{#/blank#} (think) that it was only small and not very important, and look where we have ended up today."