Read the following article and select the best answer. Article: Fishing is a popular activity and every fisherman knows the rule: Keep the big ones, throw the smaller ones back. The idea behind Lt is simple - the larger fish are probably older. If you keep the smaller ones, they won't be able to reproduce, and the fish population is in danger. But fishing out the largest fish from a population has an unwanted effect: Over time, fewer adult fish get really big. If only the smaller fish reproduce , then future generations become smaller. This is an example of evolution in action. One scientist, Dr David Conover has spent the last decade studying the effects of the "keep the big ones" rule and if they can be reversed . To set up his experiment, Conover and his team caught hundreds of silverside fish and divided them into six groups. For two groups, Conover followed the "keep the large ones" rule and took out the biggest fish. For two other groups, he removed only the small fish. For the last two groups, he removed fish at random . After five years, he measured the fish in each group. In the two groups where the largest fish were regularly removed, the average fish size was smaller than the average size in the other groups. Here was evolution in action: If only small fish survive to reproduce, then future generations of fish will also tend to be small. For the second five years of his experiment, Conover changed the rules and took fish randomly from each group. At the end of the experiment, he found that the fish that were in the "keep the large ones" group for the first five years had started to get larger again, although he calculated it would take at least 12 years for the fish in that group to return to their original size. In other words, it takes less time to shrink than it does to recover. Question: What is the author's intention in writing this article? - To encourage people to fish more carefully. - To urge governments to change the rules of fishing. - To describe the results of a scientific experiment. - To introduce the rules of fishing to readers.
To describe the results of a scientific experiment.

Read the following article and select the best answer. Article: We all need to exercise.Doctors say it is good for us.It makes our heart and body strong.It also gives you more energy .And you will feel better about yourself.It's good to exercise twice a week.Twenty minutes each time is enough. There are many ways to exercise.You can walk,run,play sports or swim.Many people go to special places to exercise.They are called "fitness centers ".These places have a lot of equipments .People can do different sports there.Some people buy equipments for their homes.But it is very expensive. Exercising can be fun.Friends can exercise together at a fitness center,or they can play sports together.How do you exercise? How often do you exercise? Question: At fitness centers, _ . - you can buy expensive equipments - people can do many kinds of exercise - it is very expensive - exercising is not popular
people can do many kinds of exercise

Q: Read the following article and select the best answer. Article: Who do you think are the most important people in your life, your parents, your sisters or your brothers, or your friends? I think your answer must be "my friends". Some teenagers often say their parents don't understand them. In large families, brothers and sisters often argue with each other. So most of us think friends are the most important people in our lives. It is very important for teenagers to have one good friend or a group of friends. As for the reason, it may be because we can discuss some private things with friends. Of course we won't tell these thi ngs to our family members. However, parents often try to choose friends for us. They may even stop us from meeting some of our best friends. In fact, they do it just because they care for us too much. But they often neglect our real feeling. How can you solve this problem? I think the best way is to find a right time to talk with parents about our real feelings. Question: Many teenagers think _ are the most important people in their lives. - parents - friends - family members - brothers and sisters
A: friends

Question: Read the following article and select the best answer. Article: Some people think only school children do not agree with their parents,however,it is not true. Communication is a problem for parents and children of all ages.If it's hard for you to communicate with your parents,don't worry about it.Here are some advice for you to bridge the generation gap . Don't argue with your parents.Don't get to your parents when you are angry.Your parents probably won't consider your ideas if you are shouting at them. And you can't express yourself well if you are angry. Go someplace to _ . Make sure you understand why you are unhappy. Then think about what you want to say to your parents. If you don't think you can speak to them at the moment, try writing a letter. Try to reach a compromise . Perhaps you and your parents disagree on something. You can keep your disagreement and try your best to accept each other. Michael's mother didn't agree with him about buying a motorcycle. They argued over it. But they finally came to a compromise. Michael bought the motorcycle, but only drove it on certain days. Of course, your parents might refuse to compromise on something. In these situations, it is especially important to show love and respect to them. Showing respect will keep your relationship strong. Talk about your values. The values of your parents are probably different from those of your own. Tell your parents what you care about, and why. Understanding your values might help them see your purposes in life. A good relationship with your parents can make you a better and happier person. Question: From the passage we learn that _ - parents and children should not have a generation gap - parents should show love and respect to their children - there are some good ways to bridge the generation gap - there are so many serious problems in families today
Answer: there are some good ways to bridge the generation gap

Q: Read the following article and select the best answer. Article: Are you still doing the V for victory sign? It's out. The latest popular hand gesture is to curl both of your hands and put them together to make a heart shape. Known as "Hand heart", many young stars in the US including Justin Bieber, Blake Lively and Taylor Swift have done the gesture in recent photos. "The heart hand gesture means something between I love you and thank you." said the country singer Taylor Swift. It's a sweet, easy message which you can send without saying a word." Taylor Swift often puts her hands above her head in the heart shape at her concerts. And she is believed to be the first to make the gesture popular. Last month during a charity show, Justin Bieber and his superstar friends did the hand heart and put the photo online. They did it to help three kids whose parents were killed in a car accident. The gesture became more popular after that. "It used to take longer for nonverbal culture to move. But now, with smart phones and the Internet, it's much faster," said Patti Wood, an American language expert . In our neighbor country--South Korea, the hand heart has been popular for a long time. In a different way, people there like making a "bigger heart" by putting their hands above their heads and making a heart shape with their arms. It means "I love you." Question: From the passage we can learn that _ . - the V gesture is not popular now - the hand heart gesture only means--I love you - it takes longer for nonverbal culture to move now - people in South Korea don't like the gesture
A: the V gesture is not popular now