Percy Bysshe Shelley was an English poet of the early nineteenth century.He {#blank#}1{#/blank#} (know) as one of the most important poets in English literature.Some of his poems，like Ozymandias and Ode to the West Wind，are listed in {#blank#}2{#/blank#} (famous)poems in England.

    Shelley was born in Horsham，Sussex.He was the son of a member of Parliament.He attended the University of Oxford at the age of 17 {#blank#}3{#/blank#}  he was not popular with his classmates and teachers for being an atheist(无神论者).{#blank#}4{#/blank#} (final)，he was fired from the university.He married a kind girl，but he left his wife {#blank#}5{#/blank#} (make) trips in Europe.After his first wife's {#blank#}6{#/blank#} (die)，Shelley married Mary Godwin.She later became as famous as Shelley and she was {#blank#}7{#/blank#}  author of the novel Frankenstein.

    Shelley left England and spent much of his life {#blank#}8{#/blank#} (travel) in Europe，especially in Italy.He became a close friend {#blank#}9{#/blank#} the poet Lord Byron，who also left England and traveled in Europe because of argument at home.Shelley kept writing poetry throughout this time.

    About a month before his thirtieth birthday，Shelley died in a boating accident.After his funeral，his ashes were buried in Rome，a perfect resting place {#blank#}10{#/blank#} (think) by Shelley.

    In much of Asia, especially the so-called"rice bowl" cultures of China, Japan, Korea{#blank#}1{#/blank#} Vietnam, food is usually eaten with chopsticks.

    Chopsticks are usually two long, thin pieces of wood or bamboo. They can also be made of plastic, animal bone or metal. Sometimes chopsticks are quite artistic. Truly elegant chopsticks might{#blank#}2{#/blank#}(make) of gold and silver with Chinese characters. Skilled workers also combine various hardwoods and metal{#blank#}3{#/blank#}create) special designs.

    The Chinese have used chopsticks for five thousand years. People probably cooked their food in large pots{#blank#}4{#/blank#}(use) twigs(树枝) to remove it. Over time,{#blank#}5{#/blank#} the population grew, people began cutting food into small pieces so it would cook more quickly. Food in small pieces could be eaten easily with twigs which {#blank#}6{#/blank#}( gradual) turned into chopsticks.

    Some people think that the great Chinese scholar Confucius{#blank#}7{#/blank#}lived from roughly 551 to 479 B.C. ,influenced the {#blank#}8{#/blank#}develop) of chopsticks. Confucius believed knives would remind people of killings and{#blank#}9{#/blank#}(be) too violent for use at the table.

    Chopsticks are not used everywhere in Asia. In India, for example, most people traditionally eat{#blank#}10{#/blank#} their hands.

    No one thought that young Albert Einstein would grow up to change the world. He was so slow in learning to speak that he was considered a bit {#blank#}1{#/blank#}(fool).

    Albert Einstein was never happy in school. He answered slowly because he was very thoughtful, and he asked difficult questions, which made {#blank#}2{#/blank#}(he) teachers think that he was trying {#blank#}3{#/blank#}(make) trouble. The strict discipline（纪律）of a German school made him very unhappy.

    However, young Einstein {#blank#}4{#/blank#}(do) learn what interested him, and he was interested in what lay below the surface of {#blank#}5{#/blank#}(thing). For instance, his father once gave him a compass（指南针）. This made Albert curious {#blank#}6{#/blank#} the unseen forces that could keep a compass needle always pointing north. In his teens he read deep in science. He had already started to wonder about the mysteries of {#blank#}7{#/blank#} universe.

    At 17, Einstein entered the Polytechnic Institute in Zurich, Switzerland, {#blank#}8{#/blank#} he studied mathematics and physics. He stayed away from many lectures and did not impress his professors, but he was {#blank#}9{#/blank#} (actual) studying very hard all the time. When he graduated in 1900, he asked to be appointed as an assistant in the physics department but {#blank#}10{#/blank#}(refuse).

    Brave and {#blank#}1{#/blank#}(intelligence), the tiny mouse from the US cartoon series Tom and Jerry is loved and remembered by fans worldwide.

    Recently, scientists from Britain and Canada have created super-clever mice by {#blank#}2{#/blank#}(change) a single gene (基因). In the study, {#blank#}3{#/blank#}(research) changed one of the mice's genes to stop the PDE4B enzyme (酶), a substance found in the human brain, {#blank#}4{#/blank#} working.

    After that, they ran several tests on the {#blank#}5{#/blank#}(behave) and found they tended to learn{#blank#}6{#/blank#}(fast), remember events for longer and {#blank#}7{#/blank#}(solution) difficult problems better than normal mice. The mice also suffered less anxiety (焦虑) and showed {#blank#}8{#/blank#} fear of cats, their natural enemy.

    A team from the UK's Leeds University is now trying developing drugs (药品){#blank#}9{#/blank#} could block the PDE4B enzyme. {#blank#}10{#/blank#}(hope), the drugs could help with treatments for brain conditions such as Alzheimer's disease (老年痴呆症).