Garbage collector Jose Gutierrez is 53 years old. When he was young his family was too poor to keep him in school. Jose left school when he was in Grade Two, but that did not stop him having a love for reading.

    Jose said he got the love of reading from his mother. “She read me stories every night,” said Jose. He hopes that every poor child in his city can have books to read. Jose started saving books from garbage twenty years ago. Every day he drives the garbage truck through the city's rich neighborhoods to get old books. Now there are about 20,000 books in Jose's small house. It is already a famous library.

    Books are rare things for children in poor neighborhoods. New books are too expensive. There are nineteen libraries in Bogota, the city where Jose lives, but they are all far from poor neighborhoods.

    Now Jose is famous in Bogota. Many people give old books to him. Jose plans to make more libraries to help more children.

根据短文内容，选择最佳答案。

    My parents told me we were going camping during winter vacation. Camping! They are always trying to get me outside more. It seems like my mom is always saying, "Brian, turn off the computer!" or "Brian, put down your phone and talk to us!" They don't understand that I'm in the zone when I'm using a keyboard, so of course I don't want to stop.

    We drove for an hour to Everglades National Park. As soon as we got there, I couldn't get a signal(信号) for my phone. Suddenly, I was facing three days of no contact with the outside world. My mom tried to tell me I'd like it, "You'll be able to look around more when you're not staring at a screen."

    We took a hike with a ranger(护林者) in the afternoon. He explained a lot to us about the Everglades. At first, I couldn't care less, but after a while I started listening. By the end of the hike, I realized there was more action going on in the park than in most video games.

    We did a lot of walking and that night I was really tired. Even so, I woke up in the midnight, and I was scared at first because of some strange sounds. But then I realized it was the barred owl that the ranger had described. It sounded like it was calling out "Who cooks for you? Who cooks for you?" Then I was not afraid anymore and went back to sleep.

    The next two days we did a lot more exploring. I saw that all the land and water and animals were connected in the Everglades. Small fish eat mosquito eggs; large fish eat those smaller fish; and alligators eat the large fish. If you got rid of(除掉) the mosquitoes, you might lose some of the other animals higher up the food chain too.

    After we left, we talked in the car about the Everglades. Right in the middle of our discussion, I heard a familiar sound from my phone. My friend Jeff was sending me a message. I reached for my phone, then put it back down. "Aren't you going to reply?" asked Mom.

    "I will in a little while," I said. My dad and mom looked at each other and just smiled.

Fleming saw many soldiers die from infections (感染) in their wounds as he worked in a hospital during World War I. This made Fleming decide to find a way to help the body fight infections. 

In September 1928, Fleming left some glass dishes on a bench in his laboratory for two weeks. When he came back, he noticed something puzzling. Bacteria (细菌) were growing on all the glass dishes except one. On this dish mould (霉菌) had started to grow—the kind found on old bread. The mould seemed to be giving off something that stopped the bacteria from growing. Fleming called it "mould juice". He tried it on other bacteria, and it killed them, too. Fleming became wild with joy and named it penicillin. 

Unfortunately, Fleming's boss thought he was wasting his time and it was impossible to kill bacteria at that time. Fleming did a few more experiments with penicillin, and he also wrote about it so other scientists could learn about it. However, because no one seemed interested in his discovery, he forgot about penicillin and started to work on other things. 

In 1939, Ernest Chain, a scientist, and his boss, Howard Florey, were looking for medicines that could kill bacteria. They discovered Fleming's notes and decided to test penicillin. In 1940, they gave penicillin to some sick mice, who survived later. But those who didn't get it died. Florey declared: "It looks like a miracle!" By 1943, the final tests on humans were finished successfully and the world had its first antibiotic (抗生素) medicine.

Ye Lianping is a 96- year- old re tired teacher from a village in Anhui Province. He has been teaching left- behind children there for free during the past 24 years. 

Teaching has always been an important part of Ye's life. After he retired, he began offering free English- language classes to left- behind children. He first set up a classroom in his own house. Later, with the help of the government, he got another two classrooms. To provide education for more children, he also set up the Ye Lianping Scholarship Fund with almost all his money and the donations（捐赠物） from others. So far, it has helped hundreds of left- behind children. 

Ye is quite generous（慷慨的） to these children, but he spends very little money on himself. He lives a very simple life. He lives with his wife in a house built over 30 years ago. He never buys any drinks. And he has been wearing the same jacket for over 40 years. 

Although he is getting older, Ye is never tired of teaching. In 2018, he got hurt while riding a bicycle to buy vegetables. Instead of resting in bed for recovery, he quickly returned to class with a walking stick. 

Ye is racing against time to spend as much time as possible on left- behind children's education. People call him "the candlelight of the village". But he said, "I'm just a firefly（萤火虫）, muking little light, not as much light as a candlelight can give. "