阅读下列材料，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。

    After that, we went on down the river. It was very dark that night and it wasn't easy to see where we were going. Suddenly, a big steamboat came at us very fast, and the next minute it was right over us. Jim and I jumped off the raft (木筏) into the water. The boat hit the raft and went on up the river.

    When I came up out of the water, I couldn't see Jim anywhere. I called out his name again and again, but there was no answer. “He's dead!” I thought. Slowly, I swam to the side of the river and got out. I saw that I was near a big old wooden house. Suddenly a lot of very angry dogs jumped out at me. They made a terrible noise and someone called from the house, “Who's there?”

“George Jackson,” I answered quickly. “I've fallen off a river boat.”

    Well, the people who lived in that house were very kind, and they took me in and gave me some new clothes and a good meal. I told them that my family were all dead, so they said I could stay with them as long as I wanted. It was a beautiful house and the food was good there, so I stayed.

    A few days later one of the slaves in the house came to me and said, “Come with me!” Together, we went down to some trees by the river. “In there!” he said and went away.

    On the ground, I found a man, asleep. It was Jim! I was really pleased to see him. When the steamboat hit the raft, Jim told me, the raft didn't break up. Jim swam after it and caught it. Then he began to look for me.

We decided to leave at once. It's all right living in a house for a little while, but you feel more free and easy and comfortable on a raft.

    This is Mrs. White. Now she is teaching math. She works in a middle school. She lives in London, Mrs. White and Mr. White have three children. They all love animals and they have a big dog and a cute cat.

    Mrs. White is Sophie's aunt, Sophie lives and studies in Liverpool, but now she is in London. She is on her holiday here. She wants to do some shopping with her aunt.

    Mrs. White's son Arnold doesn't like shopping, but he loves going out with friends. They usually go to a park to play soccer or basketball in the afternoon. Today, Arnold isn't playing soccer or basketball. He is swimming.

    Mr. White works for a company (公司). He isn't working today, because he isn't feeling well. He is in a hospital now.

Do you have true friends? Do you want to know better between you and your friends? There are three different kinds of friends: "pest friends", "guest friends", and "best friends".

The first kind of friends is simply acquaintances (熟人), and all you usually know about them is their names. You may meet this kind of friends at school, at work, or on the bus, but you don't miss them when they're not around. When this kind of friends do something bad, you don't tell them. That is why they are called "pest friends".

The second kind of friends could also be called "social partners". They are closer than acquaintances, but not as close as true friends. You know their names, a little about what they like or dislike, and a little about their family histories; you usually have a few things in common, but you don't talk about anything deep, such as your wishes or fears, and they don't open up to you how they really feel.

The last kind of friends, the "best friends", are the people you know the deepest.

You're like family, and know everything about each other. You have no problem staying at each other's houses, and you share your deepest feelings and thoughts. They will correct you when you're wrong, and though they may not be perfect, they at least will always care about you, and never do anything on purpose (故意地) to hurt you.

We all have our pest, guest, and best friends. We should value (重视) all friendship. Remember, all best friends start out as just acquaintances.

Do you know how to learn a new language quickly? The best way is to put yourself in the language.

Talk with a native speaker(讲母语的人).People often spend too much time learning grammar. However, speaking with a native speaker can help people learn better. If a friend around you can speak the language you plan to learn, try to ask him or her for help. If it's hard to find such a person in your real life, you can make a pen friend online. Of course, you can travel to a country where the language is spoken. It doesn't matter whether you speak the language well or not. When you communicate in it, you are improving your speaking.

Use the language as much as you can. People often say they have learnt a language for many years, but their speaking is still not fluent (流 畅 的). In fact, they perhaps speak the language for only a few hours a week in these years. If you want to learn a new language quickly, remember to use it every day. If you can save your break time, you can learn extra (额外的) 20 or 30 words a day.

Times really change! When I heard that the Sunshine Bookstore was closing. I was so sad. The bookstore was in the neighborhood for about 50 years, and it was a great place where people could read the books they love. 

When I met Old Peter, the store's owner, he told me it was difficult to run a traditional (传统) bookstore. Most young people now would like to read e-books and more people bought books online. 

Childhood memories came back to me so clearly. A group of us kids often went to the stere. We looked at the new books, or just talked with Peter. We spent hours reading there. Peter encouraged us to share our ideas by writing them on a large board. 

A few months later, I was back and was surprised to see that the Sunshine Bookstore was still open for business. It was still old outside, but when I went into it, it was quite a different world. A book reading was going on. Nearby, some readers were sharing their ideas on a screen instead of the large board. Some were reading on computers. It even had a coffee shop selling nice food. Clearly, the Sunshine Bookstore was in good, creative hands.

Peter told me that there were more activities in the coffee shop such as book readings and even music shows and movie nights. The bookstore was turned into a place where the book lovers got together and shared ideas and experiences. 

"Well, as you can see, technology (科技) and creativity have brought my old bookstore into the 21^st century! I'm so glad to see that everything I wanted it to offer (提供) to the neighborhood is still here," said Peter. 

No matter how times change, there are always people who love reading. Traditional bookstores are also changing in a creative way. 

 For years, scientists have been researching how exposing(暴露) humans to nature may improve their physical and mental health. People are encouraged to visit forests and grow houseplants. Now researchers are also testing whether we can get some of the same benefits from experiencing nature in VR(虚拟现实). 

 Scientists are trying to understand what exactly about nature makes a real difference in health results. One tool that might help is VR, says Hector Alvarez, who wanted to find out if simply seeing nature can relax people. In an experiment, VR allowed him to expose people to the visual(视觉的) experience of nature while controlling temperature, light and air pollution. He is now preparing to publish his research. 

 People can feel safe faster in environments with lots of plants, Hector explains. "That's why I was interested in VR. If it is right that we feel safe faster in nature, it should bring your stress levels down. "

 So far, Hector says, research shows there are some health improvements by experiencing nature in VR. However, they are smaller than those got in the real nature. 

 Gretchen Daily is an environmental scientist at Stanford University. She agrees at parts of this research, especially in situations without nature. But in the long term, connection with nature in the real world can not be replaced. To some degree, Gretchen worries that the idea might take off that VR can replace the real thing. "If that's taken very far, that' ll be really harmful overall because the real thing is necessary in so many ways, " she says. "We just cannot live on a dead planet. "