阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Diets have changed in China — and so too has its top crop. Since 2011,the country ___(1)___（grow）more corn than rice. Corn production has jumped nearly 125 percent over ___(2)___ past 25 years, while rice has increased only 7 percent.

A taste for meat is ___(3)___ (actual) behind the change: An important part of its corn is used to feed chickens, pigs, and cattle. Another reason for corn's rise: The government encourages farmers to grow corn instead of rice ___(4_)__ (improve) water quality. Corn uses less water ___(5)___ rice and creates less fertilizer(化肥) runoff. This switch has decreased ___(6)___ (pollute) in the country's major lakes and reservoirs and made drinking water safer for people.

According to the World Bank, China accounts for about 30 percent of total ___(7)___ (globe)fertilizer consumption. The Chinese Ministry of Agriculture finds that between 2005—when the government ___(8)___ (start) a soil-testing program ___(9)___ gives specific fertilizer recommendations to farmers - and 2011, fertilizer use dropped by 7.7 million tons. That prevented the emission(排放) of 51.8 million tons of carbon dioxide. China's approach to protecting its environment while ___(10)___ (feed) its citizens "offers useful lessons for agriculture and food policymakers worldwide." says the bank's Juergen Voegele.

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阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Wang Kun and Wang Wei have dreamed about    (1)    (take) a great bike trip. When they graduated   (2)   college. They decided    (3)   (cycle) along the Mekong River with their

   (4)   (cousin) .Wang Wei is very stubborn. Once she is    (5)    (determine) to do something, she will never change    (6)(she) mind. Although it is difficult to travel along the Mekong River by bike, she insisted that they find    (7)   source of the river    (8)begin their journey there. They    (9)(spend) a night in the mountains. At midnight the sky became    (10)   (clean) and the stars grew brighter. As they lay beneath the stars they thought about how far they had already travelled.

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Today I want to share a story about the importance of being confident with you. Tom,   (1)  student in a middle school, failed in exams again and again,   (2)  made him very sad.  He felt very  (3)  (confuse) about what he should do. So he turned to his teacher Mr.Wang  (4)   help.

Mr. Wang suggested Tom  (5)  (have) confidence in himself and focus  (6)   (him) attention on the weakest subjects. Keeping Mr. Wang’s  (7)   (advise) in mind, Tom became active in class and worked even   (8)   (hard) than before. As a result, over the past few months, Tom   (9)  (make) great progress in all the exams. Therefore,from this story we can come to a conclusion that to be confident is of great   (10)   (important).

   Everyone has seen plants growing ,but have you ever thought ______(1)_____they get their food? In the 17th century, a European scientist ______(2)______(call) Van Helmot asked this question. Like most people, he thought that plants must get their food from soil. However, Van Helmot decide ______(3)_____(test ) the theory with experiments.

First, he dried come soil, put it into a pot and weighed it. Next, he weighed a small tree, planted it in the pot and added rain water. Then, he watered it ______(4)_____(regular) with rain water.

After five years, he removed the tree from the pot and weighed it again. He found that the tree had gained ______(5)_____ huge amount of weight. When he weighed the soil, however, it was almost exactly the same as it had been five years ______(6)_____(early). So Van Helmot drew the ______(7)_____(conclude) that the tree grew by drinking water. Though it turned out to be wrong, he showed the importance of the use of scientific evidence to support ideas.

We now know that plants and trees make ______(8)_____(they) own food. Their leaves, when ______(9)_____(expose) to the air and the sun, are like factories that can change the energy from the sun into chemical energy. During this process, oxygen and sugar ___(10)____(produce). The oxygen is released back into the air, and the sugar is used by the plant as food.

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 Last October , while tending her garden in Mora , Sweden , Lena Pahlsson pulled out a handful of small   (1)  (carrot) and was about to throw them away. But something made her look closer , and she noticed a   (2)  (shine) object. Yes, there beneath the leafy top of one tiny carrot was her long-lost wedding ring.

  Pahlsson screamed   (3)  loudly that her daughter came running from the house.“she thought I had hurt   (4)  (I),”says Pahlsson

  Sixteen years   (5)  (early), Pahlsson had removed the diamond ring   (6)  (cook) a meal. When she wanted to put the ring back on later, it was gone. She suspected that one of her three daughters—then ten, eight, and six— had picked it up, but the girls said they hadn't. Pahlsson and her husband   (7)   (search) the kitchen, checking every corner, but turned up nothing.“I gave up hope of finding my ring again," she says. She never replaced it.                          

  Pahlsson and her husband now think the ring probably got  (8)  (sweep) into a pile of kitchen rubbish and was spread over the garden,   (9)  it remained until the carrot’s leafy top accidentally sprouted (生长) through it. For Pahlsson, its return was   (10)   wonder.

In 1863the first underground passenger railway in the world opened in London. It ran for just under seven kilometers and allowed people to avoid terrible _  (1)  __(crowd) on the roads above as they travelled to and __  (2)  _ work. It took three years to complete and was built using an interesting method. This included digging up the road, __  (3)  ___(lay) the track and then building a strong roof over__  (4)  __ top. When all those had been done, the road surface was replaced.

   Steam engines __  (5)  _(use) to pull the carriages and it must have been__  (6)  _(fair)unpleasant for the passengers, with all the smoke and noise. However, the railway quickly proved to be a great success and within six months, more than 25,000 people were using__  (7)  _ every day.

   Later, engineers ____  (8)  __(manage) to construct railways in a system of deep tunnels (隧道）, which became known to the tube. This development was only possible with the _  (9)  __ (introduce) of electric-powered engines and lifts. The central London Railway was one of the most __  (10)  __(success) of these new lines, and was opened in 1900. It had white-painted tunnels and bright red carriages, and proved extremely popular with the public.

With the (1)(develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because of air pollution. 

   Air pollution is caused by the (2)(follow) reasons. It is (3)(main) caused by vehicles. There are more and more cars, buses on the roads and they give off (4)(poison) gases. About 25% of air pollution is caused by factories. Another factor is the smoking,(5)not only (6)(do) harm to smokers’ health but also to others’ health . Besides these, about 10% of air pollution is caused by other reasons. 

We should take some measures (7)(fight) against pollution. New fuel can be used to take(8)place of gas. We can plant more trees. If everyone realizes the importance of environment (9)does something to stop pollution, the problem will (10)(solve). 

Nick Gandon can drink up to 300 cups a day,   (1)   (taste) anything from 50 to 75 different types of tea in an hour for customers. “You drink it     (2)     (slow) so it mixes with the oxygen in the air. " After working in the tea industry for almost 20 years, he is able    (3)   (tell) the flavor of the tea within two or three seconds.

     But learning to taste tea is not something   (4)    can be taught easily. Gandon was sent to learn the skill from   (5)  (expert) in China, where he would taste 600 cups a day. "The man who taught me used to say it’s a thing that must be experienced rather than being taught   (6)     a lecture. " Now he says judging a good tea is as easy as driving a car. "Just like when you change speed, you know where everything is. It becomes a   (7)     (nature) process. "

Gandon    (8)     (get) interested in his work by accident after taking a holiday job. He is now doing    (9)   business, which sells around 300 tonnes of high quality tea a year. His most important partner is prepared to pay thousands of pounds per kilogram Puˈer tea   (10)      (produce) in China.

Having worked as captain of the lifeboat at Portland Bay in the north of England for over thirty years now, I feel quite proud of my career. In my time, I've rescued fishermen with broken-down boats, swimmers   (1)  (sweep) out to sea and once even a pilot whose helicopter had developed engine   (2)  (fail)．

    I've always been mad about the sea, and about the lifeboat. Both my father and grandfather were volunteers on the lifeboat.   (3)  , I'm the first one in the family to be captain. This means that different from my father and grandfather, I work full-time at the lifeboat station.   (4)   rest of the crew are volunteers   (5)   (work) in other jobs locally. When the alarm goes, to signal a call-out, the crew members must drop whatever they   (6)   (do) and report for duty    (7)  (immediate)---we can be out on the water within a few minutes of the alarm sounding.

    The coastline here can be one of the   (8)   (bad) places in England. When the wind is in the east, the waves can be huge and there are a lot of rocks just beneath the surface of the water,   (9)   makes it a dangerous place for shipping. But the sea feels    (10)   a home for me--- it's where I belong, in spite of its dangers.