Read the article and select the best answer. Article: For most of history scientists and mankind in general considered plants to be passive organisms just with no reason or means of communicating with one another. But new research has revealed that many plants actually 'chat' quite a bit over their own networks, which may also indicate that your auntisn't quite as crazy as you thought. You know, the one that talks to her petunias and expects an answer. In fact, many plants form internal communication networks and are able to exchange information efficiently. These connections enable the plants to share information via internal channels in a manner very similar to computer networks. So what kind of things do plants tell each other? Researcher Josef Stuefer found that one purpose for plants having their own "chat systems" is to warn each other. He and his colleagues were the first to prove that clover plants do indeed warn each other via these network links if enemies are nearby. For example, if one of the plants is attacked by caterpillars , it will warn the other members of the network via an internal signal. After receiving a warning, the other plants will strengthen their protective chemical and mechanical resistance so that they are less attractive to advancing caterpillars. This early warning system allows the plants to stay one step ahead of their enemies. Experimental research has revealed that this communication significantly limits the damage to the plants. It is also known that plants have "family values", with new research revealing they have the ability to recognize close s in order to help each other survive. Research found plants from the same species of beach-dwelling wildflowers, for example, grew aggressively alongside unrelated neighbors but were less competitive when they shared soil with their siblings. Some researchers think that plants must communicate through their roots, identifying themselves using tiny chemical signatures specific to each plant's family. The research shows that our current concept of plants is... Question: The best title for this passage may be _ . Options: A: Existence in the prefix = st1 /GreenKingdom B: Competition in the GreenKingdom C: Communication with Green Plants D: Communication of the GreenKingdom
D

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Read the article and select the best answer. Article: Finding true happiness is a universal aspiration . We all want it, but can we all have it? Genuine happiness is written all over our faces when we are truly contented, and, likewise, a forced smile does nothing to hide underlying sadness. Believing that everyone can create their own lasting joy, Matthieu Richard has been declared the Happiest Man in the World. Richard earned his "happiest man" status after a series of laboratory tests in 2004. Richard has shared his thoughts on happiness with a worldwide audience. As an experienced speaker, he has explained his insights into happiness to everyone, from students to corporate groups. Looking inwards to find joy rather than relying on outer conditions, he believes, is the way to achieve well-being. "It's quite clear that the outer conditions are not enough. The way we interpret those outer conditions in our inner experience is what determines either a sense of well-being or misery. We love to go jogging for fitness and we do all kinds of things to remain beautiful, yet we spend surprisingly little time taking care of what matters most: the way our minds function. It's the essential thing that determines the quality of our experience." Besides this, Richard stresses that it is not what's happening around us that makes us unhappy, but rather the way we choose to react to it. The pursuit of happiness is becoming a modern obsession . As life becomes more complex, our ability to process our reactions to various outside influences comes under strain. "Genuine happiness" he says, "doesn't mean pleasant feelings one after the other. It's more like a series of qualities that we can develop as skills -- like openness, genuine love, compassion, inner strength and inner peace." Question: Richard has been declared the Happiest Man in the World _ . Options: A: because he has shared his thoughts on happiness with a worldwide audience B: after he has explained his insights into happiness to everyone C: after a series of laboratory tests D: because he tries his best to achieve happiness and well-being
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C

Read the article and select the best answer. Article: NEW YORK (AP) -- The investigation into the disappearance of 6-year-old Etan Patz has gone through decades and countries, from basements to rooftops and seemingly everywhere in between. No one has ever been charged criminally -- and the little boy with sandy brown hair and a toothy grin was declared dead in 2001. This week, the six-year-old boy who went missing from the Soho area of New York City in 1979 is back in the news. Police and the FBI are investigating a possible lead into the 33-year-old case of Etan Patz, the first missing child to appear on the side of a milk box. The child disappeared on the way to school on the morning of May 25, 1979. It was the first time he was allowed to walk the two blocks to the bus stop alone. A tip seemed to have led officials to the basement of a building on the corner of Prince and Wooster streets, about a block and a half from where Etan had lived with his family. The name Etan Patz has become a hot topic on Twitter as people _ . Shirley Brady noted: "As mom to a 6 years old in Soho, it's still held out by locals as cautionary tale ." Another wrote, "Boy who disappeared on his way to school in 1979 has been REOPENED! Crazy." One wondered, "Why is FBI and NYPD searching for a kid that disappeared in 1979?" Good question. This is a case that Stuart Gra Bois, as an assistant U.S. lawyer under Rudolph Giuliani, followed for years. It became the most famous missing-person case in New York City, turned a nationwide spotlight on missing children, and created headlines around the globe. No one was ever stated guilty of the crime. The case led to the creation of National Missing Children's Day, marked on May 25, the day the blond-haired, blue-eyed child went missing. The case has even pointed to a suspect, charged with child molester Julio Antonio Ramos, who is currently in prison. Patz's babysitter had been dating the man, and Ramos did know the kid, but has denied taking him away. New evidence in the case suggests another suspect who lived in the apartment at the time: a... Question: We can learn from the passage that _ . Options: A: People air the same view about the case on the Internet B: People reject the reopening of the case of the missing boy C: The missing-person case still has a long-lasting influence on people D: Twitter is the only place for people to discuss about missing-person cases
C