Beethoven is regarded as one of the most remarkable     1     (music) who ever lived. By the time he was a teenager, he     2     (enjoy) a reputation for his talent. He started to lose his hearing in his late twenties,     3     deeply depressed him. Even in his darkest moments, however, he never abandoned hope. Despite his hearing     4     (lose), he was determined to find a way to continue living a life full of music. He used a     5     (various) of hearing aids to try to increase the amount of sound he could take     6    . When     7     (compose) music at the piano, he would put one end of a pencil in his mouth and place the other end     8     the instrument so that he could feel the notes. In his Symphony No. 9, the music moves through technically difficult section     9     ease,     10     (show) his genius as a composer.

Having a roof over your head is a basic human need,     1     there are 1.2 billion people in the world without adequate housing. This may change thanks     2     a revolutionary, low-cost use of 3D printers to construct     3    (apartment). With 3D printing, materials are joined together or reinforced by making use of a computer-controlled device to create a 3D object. The houses     4    (base) on the new technology completely.

Two official companies have joined to try and help homelessness around the world     5    (gradual) by bulling affordable homes using 3D printing. Up to now, tech company ICON     6    (develop) a method for printing a one-floor, 60-square-meter house in a day for just $10,000. The usage of the new technology saves both time and money. Hopefully it will form some blocks of this kind of house,     7     is especially     8    (use) for African countries or eastern countries.

ICON, together with international housing organization New story, will start building homes in developing countries. Their joint venture will see 100 new homes     9    (construct) next year. New Story’s co-founder Alexandria Lafci said, “There are over 100 million people     10    (live) in poor conditions. The tech is ready now to print very high-quality, safe homes.”

Smart devices have become an everyday part of our lives. A smart fridge is a refrigerator that is equipped with a Wi-Fi     1     (connect). It goes above and beyond simply keeping our food cool.

“A smart refrigerator can share information about itself through a real-time camera    2     lets users see what's inside while at the supermarket, or act    3     a digital command center for the home: connecting calendars, playing music, and more," says Michael Kaufman, a reporter.

Some other things smart fridges are able to do include raising or lowering the temperature at    4     sound of your voice or with your phone, turning the ice maker on or off, or helping you track the contents of your fridge.

“It's    5     (general) easier to get informed about a problem if the temperature is lower than it should be because a door    6     (leave) ajar (半开地),”Kaufman says.“While smart fridges are still fulling the basic function of keeping food cool, they are doing in a way that's easier for you     7     (manage)."

"The people who will benefit most from a smart fridge are probably those    8     have children. It will help them know    9     is going on at home when they ' re not there, because their children might be using the fridge while they are at work. However, the price of smart fridges is higher than    10     of traditional ones," says Kimberly Palmer, an expert.

The Internet has also made our lives     1     (unbelievable) convenient, with all sorts of goods and services provided by electronic commerce. You can have food     2     (deliver) to your house using apps.     3     wait hopelessly for a taxi in the cold rain? It is now simple and fast     4     (order) one with a taxi-app. When you wish to go on holiday, you can make all your travel     5     (arrange) just in front of the computer. Forgot to carry cash? There is no need to worry—you can pay for almost everything on your smartphone.

Beneath billowing clouds, in China's far southwestern Yunnan province,     1     (lie)a place of mystery and legend. Of mighty rivers and some of the oldest jungles in the world.

Here, hidden valleys nurture strange and unique creatures, and colorful tribal cultures. It is rare     2     (find)Jungles this far north of the tropics. So, why do they thrive here? And how has this rugged landscape come to harbor(蕴藏)     3     (great)natural wealth in all China.

In the remote southwest corner of China, a celebration is about to take place. Dai people collect water for the most important festival of their year. The Dai call     4     the people of the water. Yunnan's river valleys     5     (be)their home for over 2,000 years. By bringing the river water to the temple, they honour the two things holiest to them—Buddhism and their home. The Dai give thanks for the rivers and fertile lands     6     have nurtured their culture. Though to some it might seem just an excuse     7     the biggest water fight of all time.

Dai lives are changing     8     towns get bigger and modernize but     9     Water Splashing Festival is still celebrated by all. The rivers,     10     (flow)from the distant mountains of Tibet, southward through central Yunnan in great parallel gorges, lie at the heart of Dai life and culture. The Dai now live in the borders of tropical Vietnam and Laos, but their legends tell of how their ancestors came here by following the rivers from mountain lands in the cold far north.

The efforts of Tu and her team finally     1     (pay) off. In November 1972, through trial and error, they successfully discovered qinghaosu.     2     a key part of many malaria medicines, qinghaosu has a since benefited about 200 million malaria patients. More than 40 years after its discovery, Tu     3     (award) a Nobel Prize for her work eventually. In her Nobel Lecture, she encouraged scientists to     4     (far) explore the treasure house of traditional Chinese medicine and raise it     5     a higher level.