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            • 1． Air pollution is a killer． The World Health Organization says it kills about seven million people around the world each year． Even if (1) （pollute） air does not kill us， it can make us very sick． (2) （wear） face masks， people walk past heavy traffic as Beijing is hit by a sandstorm． The government in Beijing issued a blue warning on air pollution as sandstorms swept through the Chinese capital city．
              However， breathing in dirty air (3) （frequent） may do more harm to your body， (4) can also affect your brain and your ability to think． A new study shows that air pollution can cause a huge decrease in our (5) （intelligent）．The researchers reported that long term suffering air pollution can affect a person"s mental abilities in two (6) （area）：language and math．
              The researchers studied about 25，000 people from across China． Between 2010 and 2014， these Chinese men， women and children (7) （give） language and math tests． The researchers found that breathing in (8) air which has been polluted can reduce a person"s education level by about one year． The effect generally is even (9) （bad）for those over years of age， for men and for those with little or no education． The researchers noted that the effect of pollution (10) language ability is even more serious as people age， especially among men and the less educated．
              难度：中等
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            • 2． ___________
              难度：较难
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            • 3．

              I believe doing good deeds can bring me happiness. I"ve been making breastpins (胸针) and gifting them to everyone possible and if you ask me why I do it, it"s because   (1)   the joy which just bursts forth from my inner heart. The smile that lights up at the sight of the breastpin is worth anything you"d wish for and it goes much   (2)   (far). From that moment on, there"s a   (3)   (connect) between gifting breastpins and happiness.

              We exchange warm hugs, smiles and a million "thank you". This hobby that has so at-traded me has opened my heart and brought me out of my cocoon (茧). Now, I don"t mind   (4)   (start) a conversation with a stranger, wishing him or her well and gifting a breastpin because I know that this little piece of art will do   (5)   (it) magic of breaking all barriers. We unite and share many   (6)  (story). And next time our paths cross, we greet   (7)   smile, which is enough   (8)   (brighten) the day.

              This morning, I received   (9)   heart-warming post on Instagram (照片墙) from a friend who I   (10)   (give) a blue and white spotted breastpin before. She shared it along with the shells collected from the beach. She loved sea shells and the colors blue and white. So, here"s why I make breastpins.

              难度：较难
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            • 4．           ​
              难度：较难
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            • 5．     High-speed railways, electronic payments, shared bicycles and online shopping are China's four new ways of life. They are most appealing to youths from 20 countries participating   (1)   the Belt and Road Initiative. The new four great inventions are all related to China's high-tech innovation,   (2)   has improved the quality of people's lives, "my wallet is no longer in use. I can buy and eat whatever I want   (3)   (simple) with a tap of my phone," said Lin Jinlong, an overseas Chinese student from Cambodia,   (4)   (add) that even pancake sellers are using Alipay (mobile payment)...
                  In   (5)   word, China is leading in many ways. Bike sharing, for example, is not new itself. But China has made it much more convenient and   (6)   (enjoy) both in China and overseas. Leading Chinese bike-sharing   (7)   (company), Mobike and Ofo are now operating in foreign countries such as Singapore and Britain. Users in the countries   (8)   (feel) excited and posted photos of   (9)   (they) riding the Chinese bikes on social media. A growing number of foreigners  hope   (10)   (promote) economic development in their home countries by paying more attention to the achievement of China.
              难度：较难
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            • 6．

              Last year my English class was difficult. First of all, _____  wasn’t easy for me to understand the teacher when she talked. To begin with, she spoke too _____   (quick), and I couldn’t understand every word.  _____   (late) on, I realized that it doesn’t matter if you don’t understand every word. I _____   (be) also afraid to speak in class, because I thought I might _____   (laugh) at by my classmates. I couldn’t always make complete sentences, either. Then I started to watch English-language TV. It helped a lot. I think that _____   (do) lots of listening practice is one of the _____   (secret) of becoming a good language learner. Another thing that I found _____   (difficulty) was English grammar, _____   I decided to take lots of grammar notes in every class. Then I started to write my own original(原创) sentences using the grammar I was learning. It’s _____   (amaze) how much this helped. Now I am enjoying learning English and I got an A this term. My teacher is very impressed.

              难度：较难
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