Nature is wonderful. It     1     our best teacher. It teaches us a lot and we are born to learn from it to solve     2    . For example, scientists used what they saw in nature to improve our way of travelling. In days of high-speed train research and     3    , scientists were once faced with a noise problem. The trains pushed air through tunnels at     4     speeds. So, when a train came out of a tunnel, it could be very, very     5    . However, kingfisher birds hardly make a sound when they get into lakes or rivers. Engineers     6     a clever idea. They changed the front of the trains to match the shape of the kingfisher. Then the air could     7     pass over the trains. The problem was solved!

The kingfisher     8     example is just one that we learned from nature. Scientists study the smart models that nature can     9    . Then they use their wisdom(智慧) and imagination to design new products. Nature provides us with     10     possibilities to find wonderful ways to improve our lives. Learning from nature knows no bounds(永无止境)!

Got pets? If so, lucky you! If not, maybe you’d like to. According to many     1     (doctor), spending time with animal friends has a lot of advantages.

Pets make people happier. Feelings of happiness often rise when people are with pets.     2     fact, studies show that being around animals helps people feel less alone.

Pets make people healthier. Staying with a pet can be good for     3     (you) health, too. Just watching fish swim can make people     4     (feel) more peaceful. Some pets need to spend time outdoors walking or     5     (run). Who take them? Their human friends! Getting exercise is healthy for both pets     6     people.

Pets teach important life lessons. Having a bird around—or any other animal—can teach you a lot. Pets     7     (usual) depend on their human friends to take care of them. Looking after animals teaches responsibility（责任）. It also     8     (help) people to develop life skills and gives them a sense of achievement.

Pets help you. Having a pet can be helpful. One study found that having pets in the classroom helped students get along well with each other. It helped them build up much     9     (good) relationships with their teachers and other students.

    10     a smart choice it is to keep pets!

Space suits don’t just make astronauts look cool. Without these ______ suits, astronauts wouldn’t be able to leave their spaceship. That is to say, they wouldn’t be able to ______ on the Moon or work outside the International Space Station.

Space is a ______ place for human beings. Firstly, there is no air to breathe. Secondly, space also has high levels of radiation(辐射), energy that can pass through our bodies and make us ______. Thirdly, some parts of space are really cold ______ other parts are very hot. So astronauts could die in just a few seconds if they ______ outside their spaceship without their suits. With a space suit, though, astronauts can move around in space for several hours.

Space suits keep astronauts ______ sealed(密封的) inside. A backpack sends O₂ in to let astronauts breathe normally. At the same time, the CO₂ ______ astronauts breathe out is sucked away. The suit also protects them from harmful radiation and fast-moving space dust. ______ the space suit is another suit that looks like a pair of tight pajamas(睡衣) with little pipes running through them. Water runs through these pipes to ______ astronauts because wearing a space suit can make astronauts very hot!

4 . March 2 is Old Stuff Day（旧物日）. It is all about old stuff. Things you used have been forgotten for ages in your home. You must have some old stuff around. And today is all about enjoying it. Because what’s better than finding something really great from days gone by?

It’s so easy to forget things you have. If we don’t use them every day, some things can be put away and stay there. And that’s not just the things in your home— technology grows so quickly, new toys come out all the time, new books keep coming out. In the age of new information, we can have so many things easily. Today is all about remembering the things we sometimes leave behind.

We’ve learned to value what age can bring to things. Wines, for example, are more valuable and tastier as they grow older. It’s certain that old things still have their uses, value or charm. People today will pay a pretty penny for stamps, toys, video games, board games, books, coins, and clothes of yesterday.

You can really get into the charm of old things by visiting a junk shop （旧货店）. Another person’s old stuff could be your new stuff! Or maybe now is a good day to clean up? Old stuff could become a great gift for someone else, or you could always send your old things to a charity shop. If you’re free, you could turn your old clothes into new ones with just a little change.

Today could be a good day to visit your older families. You could ask your grandparents to tell you stories about family history, their childhood and their youth. Learn about what was going on in the world when they were growing up.

Most of all, remember that today’s new stuff will one day be old stuff.

5 . It is said that tea can improve creative power of the literary (文学的) artists in ancient China.

According to Lu Yu’s Tea Classics, tea—drinking in China can be traced back (追溯) to the Zhou Dynasty — tea was discovered by Shen Nong and became popular as a drink in the State of Lu because of Zhou Gong.

Tea—drinking in China has a history of four thousand years. As the legend (传说) has it, Shen Nong tasted hundreds of wild plants to see which were poisonous, in order to prevent people from eating the poisonous plants. It is said that he was once poisoned but was saved by eating some leaves of an evergreen plant with white flowers. Later, people called the leaves that saved his life “cha”.

In modern times, people still keep tea—drinking as one of their daily activities. According to the study, tea can also have effects on some modern illnesses. To those who have to work with computers for a long time, drinking tea can help them to build up a wall against the computer radiation. To those who may have too much fat, drinking tea can help them to recreate a new balance in their bodies. And to those aged people, drinking tea is also a good way to keep a calm mood for a longer life.