Living in the wild can be hard. Finding food and staying safe aren't easy. Each day, animals struggle to survive in their habitats. Not all animals get by on their own. Some animals form a close partnership with other kinds of animals. These pairings are called symbiotic relationships. In a symbiotic relationship, the animals depend on each other. One animal helps the other meet its needs. Sounds good, right? Not always. Some animals are not very kind to their partners. In some cases, one animal meets its needs but hurts its partner. Take ticks, for example. These insects suck blood to live. To get blood, they attach themselves to other kinds of animals. Ticks can pass germs that cause disease instead of helping their hosts. In other relationships, animals don't treat their partners so poorly. Both animals benefit from living with the other animal. Small animals called cleaner shrimps have found a way of helping fish at coral reefs. As their name suggests, the shrimps clean the fish. They hang out at what scientists call a cleaning station. A fish stops by. Then a shrimp climbs onto the fish and even steps into the fish's mouth. The shrimp uses its tiny claws to pick stuff off the fish's body. That can include dead skin, tiny pieces of food, and wee creatures that can hurt the fish. The fish gets a nice cleaning. The shrimp enjoys a tasty meal of fish trash. Small birds called plovers are also in the cleaning business. They have big customers-crocodiles. Crocs have long snouts filled with sharp teeth. Cleaning them is tricky. When a croc opens its mouth, the plover hops right in. The croc does not snap its snout shut.Instead, it lets the plover eat small, harmful animals attached to the crocodile's teeth. The plover gets an easy meal while the croc gets clean teeth. Why do the cleaner shrimps clean the fish? A) To get fish trash for food. B) To eat wee creatures. C) To help fish go out of coral reefs. D) To get food for fish.
A
What kind of job do you want to do in the future ? One that earns the most money or one that gives you the highest social position? What about a job that makes you feel happy? Surprisingly, these three things do not always go together in the job world . According to a general social survey by the National Organization for Research at the University of Chicago in the US, the ten happiest jobs are not those with better pay or higher social position. They are ordinary jobs. But what is it that makes a "happy" job? Researchers found that people are happier when they feel they are doing something worthwhile. Six of the top ten happiest jobs are based heavily on helping others, such as firefighters, teachers, and physical therapists( ). Being able to express oneself is also important for people to feel satisfied . Take authors as an example. Their pay is "ridiculously low or non-existent", but "the freedom of writing down the contents of your own mind leads to happiness ,"wrote business author Steve Denning on his blog on Forbes.com. These jobs are greatly different to the top ten "hated jobs", according a website survey earlier this year. Director of information technology, sales manager, technical specialist and others that are generally considered respectable jobs are on the list. Todd May from The New York Times didn't find the results strange. He argued that " a meaningful life must, in some sense then , make people feel worthwhile". If a person doesn't participate in the causes " that are generally regarded as worthy, like feeding and clothing the poor, their life will lack meaning ,"he said . Work takes up the greater part of most people's lives . It's no wonder that the people with the most worthwhile jobs are the happiest of all. However, it's important to remember that these two surveys are broad ones and that it doesn't matter whether your dream job is on the two lists. Now it is the time to think about the future . After all, something that satisfies your mind will always bring you happiness. From the passage we learn that _ . A) the more you earn , the happier you are B) respectable jobs are happy jobs C) the higher your social position is , the happier you are D) most happy jobs are related to helping others
D
Jabbar was one of the best basketball players in history. He was the NBA's most valuable player six times and a 19-time All-Star. When he retired in 1989 he was the NBA's all-time leading scorer with 38,387 points. That record has still to be broken. After retirement, Jabbar began scoring in the literary world. He has written seven bestselling books. In his new children's book What Color is My World?, he shines the spotlight on African-Americans inventors whose achievements often went unnoticed. A reporter recently interviewed him in New York City. R: The title of your new book is What Color is My World, but the subtitle is The Lost History of African American Inventors. Why do you say it's a lost history? K: African-American inventors made some very significant contributions to American life and world culture, but they're not acknowledged. So I think I should put something in the spotlight. R: Why did you choose to present this information in the form of a children's book? K: I thought kids, especially African-American kids, needed to know this information. They should get this information at an early age so that they can have an idea of what's possible. So many kids are told that sports and entertainment are the fields that they should go into, and everything else is ignored. I wanted to put something out there that gave them a broader picture of what is possible. R: How did you combine facts with a good story? How did you decide on which inventors to include? K: The inventors I chose all made significant contributions to American life. So, everybody likes ice cream, but nobody knows about the guy who invented the ice-cream scoop . Everybody likes potato chips, but nobody really knows that a black cook invented potato chips. Things like that get through to people because these are things that are a part of their everyday life. Once they see black people were involved in inventing it, it changes things. Why did Jabbar write the book What Color is My World? A) To provide an instructive literary book for parents. B) To make people recognize the contributions African-Americans made. C) To show he also has literary talent besides the talent in basketball. D) To raise money for poor African-American kids.
B