C. A Homeless Veteran's Kindness Paid Off

　　D.A Small Kindness Made a Big Difference

　　The term"smiling depression"-appearing happy to others while actually suffering depressive symptoms-has become increasingly popular. In fact, many people who experience a low mood and a loss of pleasure in activities manage to hide their condition in this way. And these people might be particularly easy to suicide.

　　While smiling depression is not a technical term that psychologists use，it is certain to be depressed and manage to successfully mask the symptoms. The closest technical term for this condition is "atypical depression". It can be very hard to spot people suffering depression because they may seem like they don't have a reason to be sad - they have a job, an apartment and maybe even children or a partner. They smile when you greet them and can carry pleasant conversations. In short, they often put on a mask to the outside world while leading seemingly normal and active lives. Inside, however, they often feel hopeless and down, sometimes even having thoughts about ending it all.

　　People with smiling depression put on a happy face to the outside world, but they can experience a lift in their mood as a result of positive occurrences in their lives. Other symptoms of this condition include overeating, feeling a sense of heaviness in the arms and legs and being easily hurt by criticism or rejection. They are also more likely to feel depressed in the evening and feel the need to sleep longer than usual. With other forms of depression, however, your mood might be worse in the morning and you might feel the need for less sleep than you are normally used to.

　　So how can they break this circle? A starting point needs to be known that this condition actually exists and that it's serious. Only when we stop ignoring our problems because we think they're not serious enough can we start making an actual difference. Then we can find purpose by taking the attention away from ourselves and placing it onto something else. Feeling that our lives matter is finally what gives us purpose and meaning - and this can make a significant difference for our mental health and well-being.

28. What do we know about people suffering smiling depression?

　　A. They are wearing masks all day. B. They are difficult to get along with.

　　C. They lead an abnormal life actually. D. Most of them commit suicide.

29. What does the underlined word "atypical" in paragraph 2 mean?

　　A. representative B. common C. hidden D. formal

30. Compared with smiling depression, people suffering other depressions .

　　A. may feel sleepless B. feel more depressed in the evening

　　C. are tired of heaviness in the arms D. may eat more food

31. What can we do to overcome smiling depression?

　　A. Never talk about smiling depression and ignore its existence.

　　B. Admit the condition and pay attention to ourselves.

　　C. Value the importance of our life and enjoy it.

　　D. Find out the problem and place it onto somebody else.

　　Researchers in Australia have discovered an effective new method to capture the atmospheric carbon dioxide that is damaging our planet and transform it into something solid, making it much easier to store.

　　Carbon capture isn't new, but previous methods call for the gas to be compressed into liquid and then injected underground. Widespread usage of that technology has been locked by economic and environmental concerns due to possible leaks. Instead, in a study published in Nature Communications, the group details their sustainable and cost-effective plan for transforming CO2 into coal.

　　This new process involves a liquid metal catalyst( 催化剂 )that is efficient in conducting electricity. CO2 gas is dissolved in a container with some liquid. Once electricity charge is introduced, the CO2 begins to turn into solid pieces of carbon, which can be collected and stored.

　　What makes this particularly unique is that the entire process can occur at room temperature. Previous experiments have only shown a gas to solid conversion at extremely high temperature, which made it impossible on a large scale. Now, the researchers are hoping that their work will be used to create even further when it comes to carbon storage.

　　In an interesting side benefit, the solid carbon also works as an electrode（ 焊 条 ）, which opens up a world of possibilities. "A side benefit of the process is that the carbon can hold electrical charge, becoming a super battery, so it could potentially be used as a part in future vehicles," explains Dr. Dorna Estrafilzadeh, a researcher. "The process also produces fuel as a by-product, which could also have industrial applications."

32. What can we know about the previous carbon capture methods?

　　A. People have to inject liquid to the gas.

　　B. The previous methods can be done easily.

　　C. The previous methods are not very popular.

　　D. People have widely accepted previous methods.

33. What is the special part of the new method?

　　A. It needs electricity to make the process efficient.

　　B. It can be done in any kind of container.

　　C. It doesn't need extreme temperature.

　　D. It can produce much solid carbon.

34. What can we infer from the last paragraph?

　　A. The method will make fossil oil disappear.

　　B. The method will influence the future industry.

　　C. The method will make developed countries more powerful.

　　D. The method will be used to make new vehicles.

35. What is the best title for the passage?

　　A. How to change carbon into CO2.

　　B. A new carbon capture technology.

C. A new technology to get useful carbon.