On May 18, it was announced that China     1     (achieve) success in drilling fire ice, a frozen mixture of water and natural gas, from the South China Sea.     2     (official) known as methane hydrates (甲烷水合物), fire ice produces a high amount of energy when it is burnt and its chemical reaction produces nothing but dioxide and water.

Fire ice, both clean and energy-intensive,     3     (consider) the fuel of the future. But, the Chinese team succeeded in     4     (extract) fire ice for nearly eight successive days, which is a big breakthrough. However, it is too early     5     (say) a new energy source has been found. The worlds total fire ice reserve is about 21,000 trillion cubic meters，    6    , if extracted, could meet the worlds energy need for 1,000 years. But the    7     (success) test drilling of fire ice does not mean it can be extracted for     8     (industry) use. China has to solve many problems     9     it can use fire ice as a source of energy.

It’s thought that only by 2025 at     10     earliest might people be able to look at realistic commercial options.

There comes a time when the old must give way to the new. Finding and     1     (keep) the right balance between progress and the protection of cultural sites can be     2     big challenge.

In the 1950s, the Egyptian government wanted to build a new dam across the Nile     3     (control) floods, produce electricity and supply water to more farmers, but the proposal led to     4     (protest).

After listening to the experts’ opinion, the government turned to the United Nations for help. Then a committee     5     (establish) to limit damage to the Egyptian buildings and prevent the loss of cultural relics.     6     (final), a document was signed, and the work     7     (begin) in 1960.

    8     the project ended in 1980, it was considered a great success. Not only had the countries found a path     9     the future that did not run over the relics of the past, but they had also learnt that it was possible for countries to work together to build a better tomorrow. The spirit of the Aswan Dam project is still alive today.   If a problem seems too difficult for a single nation, the     10     (globe) community can sometimes provide a solution.

He lay down on the bed and fell fast asleep. When he woke up the next morning,     1     unknown hand had placed a cup of hot coffee and some fruits by his bedside.   

The man had breakfast and after tidying     2     (he) up, went downstairs to thank the generous host. But, as on the evening before, there was nobody     3     sight. Shaking his head in wonder at the strangeness of it all, he went towards the garden     4     he had left his horse, tied to a tree.     5     (sudden) a large rose bush caught his eye.   

Remembering he promised he    6     (bring) a rose to Beauty, he bent down to pick a rose. At once, out of the rose garden, rose up a horrible beast,     7     (wear) splendid clothes. A deep, terrifying voice growled (吼), “Ungrateful man! I gave you a place to stay at for the night, you ate at my table and slept in my own bed,     8     now all the thanks I get is that one of my favourite flowers     9     (pick) by you! I shall put you to death for this!” Trembling with fear, the man fell on his    10     (knee) before the Beast.

Ryan’s charity work is not unusual. Many kind-hearted people who give Ryan much support donate money for charity     1     (activity), and others volunteer to help run charities. On most UK high streets, for instance, you will often come across people    2     (raise) money and looking for volunteers for Cancer Research UK, the British Heart Foundation and many     3    (much), one of     4     many public-spirited citizens are willing to take an active part in.     5     the help of the organizations, the poor or the     6     (disable) can improve their lives or even realize their dreams.

In china, volunteers are also playing an    7     (increasing) important role in environment protection, disability    8     (assist) and many other fields. As a matter of fact, it is easy for you to be a volunteer. If you have     9     opportunity, you can visit old people houses to do some cleaning. Also, you may help sick kids in hospital so long as you put love to good use. It     10     (hope) that you can be involved in voluntary work to help others in need.

Last weekend our school held a sports meeting.    1     (realize) it was our last high school sports meeting, we decided    2    (make) it an unforgettable experience for all of us.

We first attended the opening parade, for    3    our class had made a lot of preparations. To our excitement, our parade performance was    4    great success. After the parade, the games started. My classmates attended various     5    (event) such as running, high jump and long jump. Because    6    the hard training they had done before, their performances were very    7    (impress). On the stand, my classmates applauded and cheered for the athletes, some raising their cameras to capture the exciting moments.    8     (final), the result was announced. It was    9     (amaze) that our class won the second place. Our efforts paid off! Cup in hand, we took a picture together.

I believe this sports meeting will remain a precious memory for all of us    10    time goes by.

Climate change has caused a rise in sea levels. This has increased the amount of salt in fresh water     1     (use) on coastal farms. As a result, farmers are     2     (gradual) unable to use fields close to the sea.

However, Mare Van Rijsselberg, a farmer in the Netherlands is now using a    3    (mix) of sea and fresh water     4    (grow) healthy and tasty vegetables.

He teamed up with scientists from the Free University an divided a farm    5    eight smaller areas. Separate pipes pumped fresh and sea water, and a computer program created water with eight levels of salinity (含盐度）.

The water levels and the levels of salinity was     6     (control) by computerized measuring devices called "sensors". Mr. Van Rijsselberg said he was able to harvest vegetables from most of the eight testing areas. He said the vegetables were smaller than     7    grown in fresh water. But he said they also had more sugar and salt,so they tasted much     8     (good).

He found that potatoes grew better than the other vegetables in the combination of sea and fresh water. Mr. Van Rijsselberg said four kinds of these potatoes would be sent to Pakistan,     9     quantities of land     10     (damage) by salinization last year.

What is the difference between the United Kingdom, Great Britain, Britain, and England, if    1    ? Getting to know a little bit about British history will help you solve this puzzle.

From the 16th century to the 19th century, with more countries joining, the Kingdom of England gradually becomes the United Kingdom of Great Britain and Northern Ireland, including England, Scotland, Wales and Northern Ireland,     2    (know)as UK.

The four countries    3    (belong) to the United Kingdom work together in some areas. They use the same flag, currency and military defence.     4    , they also have some differences, such as education systems, and legal systems.

The UK has a long and interesting history to explore,    5    can help you understand much more about the country and its traditions. From the first century to the 11th century, the Romans, the Anglo-Saxons, the Vikings and the Normans    6    (conquer) and ruled there, resulting in the    7    (develop) of the English language.

There is    8    (certain) so much more to learn about the interesting history and culture of the UK. Studying the history of the country will make your visit much more    9    (enjoy). The capital city London is a great place to start with a history which    10    (date)all the way back to Roman times.

Here     1     (be) some common “green truths” that have been shown to be only half true, or even     2     (complete) false.

First, paper shopping bags are better than plastic ones. In fact, both kinds of bags are bad     3     the environment. Plastic bags cause litter and are a danger to wild animals,     4     mistake them for food. It takes hundreds of years for plastic     5     (break) down.

However, making a paper bag uses four     6     (time) as much energy as making a plastic bag and up to three times the amount of water.

Second, when you turn off a device, it stops using power. Electricity continues to leak from the device, even when it     7     (turn) “off”. So we should remove the plug from its power supply.

Third, eating local food is good for the environment. In fact,     8     is the production of food that uses most of the energy. In some cases, local produce might have used     9     (much) energy than produce grown a long way away — even taking into account its transport.

Fourth, it’s better to take a shower than a bath. Actually, if you spend more than eight minutes in a shower, you’ll use as much water as in a bath—about 50 litres of water.

Environmental awareness is now part of daily life. But it’s worth     10     (check) common ideas and opinions to see what’s really green.