Of the three major drinks of the world—tea, coffee and cocoa—tea is consumed by the {#blank#}1{#/blank#} (large) number of people.

    China is the homeland of tea. Human cultivation of tea plants dates back to two thousand years ago. Tea from China, along {#blank#}2{#/blank#}her silk and porcelain, began to be known to the world more than a thousand years ago and since then it{#blank#}3{#/blank#} (be) an important Chinese export.

    At present more than forty countries in the world grow tea with Asian countries，{#blank#}4{#/blank#}  (produce) 90% of the world's total output. All tea trees in other countries have their origin directly or indirectly in China. The word for tea leaves or tea as{#blank#}5{#/blank#} drink in many countries are derivatives(衍生物)from the Chinese character “cha”. The Russians call it “cha'i”, {#blank#}6{#/blank#}sounds like “chaye”(tea leaves) as it is pronounced in northern China, and the English word “tea” sounds similar to the pronunciation of{#blank#}7{#/blank#} (it) counterpart（对应物） in Xiamen. The Japanese character for tea is written{#blank#}8{#/blank#} (exact) the same as it is in Chinese, though{#blank#}9{#/blank#} (pronounce) with a slight difference. The habit of tea drinking spread to Japan in the 6th century, but it was not introduced to Europe and America till the 17th and 18th centuries. Now the number of tea{#blank#}10{#/blank#} (drink) in the world is still on the increase.

    Recently Lindsay hasn't felt herself. She{#blank#}1{#/blank#}(be) a really good student, but her grades has fallen since three months ago. This is because she sometimes has trouble {#blank#}2{#/blank#}(pay)attention to her study. She also refuses to talk with teachers and friends. What's worse, she feels{#blank#}3{#/blank#}(tire) all the time but has difficulty in falling asleep.{#blank#}4{#/blank#}she does is brought to her mother's attention.{#blank#}5{#/blank#}, when her mother asks her what happens to her, she just says she feels like {#blank#}6{#/blank#}(cry).

    As a matter of fact, Lindsay is suffering {#blank#}7{#/blank#}clinical depression(临床抑郁症). What is clinical depression? It can be described as a mood which is so low that affects your everyday life{#blank#}8{#/blank#}(serious). The first sighs of it in teens are {#blank#}9{#/blank#}(poor) school reports than before, then learning difficulties and staying away from classmates and teachers. If you have these signs, don't worry. It is not so difficult to deal with clinical depression. There are many effective ways, such as medicine,{#blank#}10{#/blank#} (express) of feelings, more exercise and a balanced diet.

    Pollution takes away all the beauty of the beaches of Hawaii. I hate to go to the beaches on {#blank#}1{#/blank#}(sun) weekends and see rubbish bags{#blank#}2{#/blank#}(lie) on the sand, cigarette butts(烟头）{#blank#}3{#/blank#}(bury) in the sand, and soda cans floating in the ocean.

    One thing that really annoys me is that I see tourists who visit Hawaii leave their rubbish on the beaches. I was always taught after drinking soda to throw the can into the place {#blank#}4{#/blank#}it should stay at --the trash can. Another thing that annoys me is that some people walk right by rubbish {#blank#}5{#/blank#}pretend that it's not there.

    The dogs or the fish are not to blame for it. It's our fault and we must blame {#blank#}6{#/blank#}(we).Everyone has to do his or her part{#blank#}7{#/blank#} (solve) this problem. It can't be difficult to do the job. There are a lot of things that we can do. First of all, we can help pick {#blank#}8{#/blank#}rubbish along the beaches. We could also form organizations that help clean up our beaches, More{#blank#}9{#/blank#}(important),we need to start now before the beaches{#blank#}10{#/blank#}(damage) beyond repair.

    China has built a high-speed passenger rail network in recent {#blank#}1{#/blank#} (year) and will continue to expand it. By the end of 2018, China's railway mileage (里程){#blank#}2{#/blank#} (reach) 131,000 kilometers, of {#blank#}3{#/blank#} 29,000 kilometers were high-speed rail. This accounted for 2/3 of the world's total high-speed rail tracks, making China's high-speed rail system the world's {#blank#}4{#/blank#} (large) high-speed rail network.

    China's high-speed trains are similar {#blank#}5{#/blank#} those of France's TGV, German's ICE and Japan's Shinkansen. The fast trains with a top speed of 250-350 km/h {#blank#}6{#/blank#} (call) CRH, China Railway High-speed.

    If you want to travel around China, the high-speed trains will be your ideal choice since they are clean, comfortable {#blank#}7{#/blank#} modem. Unlike on the conventional trains in China, nobody is allowed {#blank#}8{#/blank#} (smoke) on high-speed trains, not even between carriages.

    The seats are as good as those on the plane or even better. Most high-speed rail tickets have corresponding (对应的) seats, and only {#blank#}9{#/blank#} small number of standing tickets are sometimes sold on limited trains. There's never a crowd of people sitting in the aisles. The ticket prices for China high-speed trains are reasonable and, on most routes, the frequency of departure is very high, so people can buy tickets{#blank#}10{#/blank#}(convenient).

    Benjamin West, the father of American painting, showed his talent for art when he was only six years of age. But he did not know about brushes before {#blank#}1{#/blank#} visitor told him he needed one. In those days, a brush was made from camel's hair. There were no camels nearby. Benjamin decided that cat hair would work instead. He cut some fur from the family cat {#blank#}2{#/blank#} (make) a brush.

    The brush did not last long. Soon Benjamin needed more fur. Before long, the cat began to look ragged(蓬乱). His father said that the cat {#blank#}3{#/blank#} be sick. Benjamin {#blank#}4{#/blank#} (force) to admit what he had been doing.

    The cat's lot was about to improve. That year, one of Benjamin's cousins, Mr. Pennington, came to visit. He was impressed with Benjamin's drawings. {#blank#}5{#/blank#} he went home, he sent Benjamin a box for paint and some brushes. He also sent six engravings(版画)by an artist. {#blank#}6{#/blank#} were the first pictures and first real paint and brushes Benjamin had even seen. In 1747, when Benjamin was nine years old, Mr. Pennington returned for another visit. He was amazed at {#blank#}7{#/blank#} Benjamin had done with his gift. He asked Benjamin's parents {#blank#}8{#/blank#} he might take the boy to Philadelphia for a visit.

    In the city, Mr. Pennington gave Benjamin materials for creating oil paintings. The boy began a landscape painting. William Williams, a well-known painter, came to see him work. Williams was impressed with Benjamin and gave him two classic books on painting to take home. The books were long and dull. Benjamin could read only a little, {#blank#}9{#/blank#} (be) a poor student. But he later said, “Those two books were my companions by day, and {#blank#}10{#/blank#} my pillow at night." While it is likely that he understood very little of the books, they were his introduction to classical paintings. The nine-year-old boy decided then that he would be an artist.