阅读理解 阅读下列短文，选出最佳答案。

    “I will think of it.” It is easy to say this, but do you know what great things have come from thinking?

    Sir Isaac Newton was sitting in his garden when he saw an apple fall from a tree. He began to think and tried to find out why the apple fell. Then he discovered how the sun, moon, and stars are kept in their places.

    A boy named James Watt sat quietly by the fire, watching the lid of the kettle move up and down. He wanted to find out why the steam in the kettle moved the lid. From that time he went on thinking and thinking. And when he became a man, he improved the steam engine (蒸汽机) so much that it could easily do the work of many horses.

     James Ferguson was a poor boy. Once, seeing the inside of a watch, he wondered. “Why should I not make a watch?” But how could he get the materials to make the mainspring (钟表的主发条)? He soon found he could make it with whalebone (鲸骨). He then made a wooden clock which kept good time. His motto (座右铭) was “I will think of it.” And he made his thoughts useful to himself and the world. 

    Boys and girls, when you have a difficult lesson to learn, don't lose heart, and don't ask someone for help before helping yourselves. Think, and by thinking you will learn how to think to some purpose.

    Joe was an old man. The 75-year-old lived very happily in a village and had a beautiful family. Joe had four grandchildren, and they visited him during their holidays.

During one vacation, Joe was preparing his home for the kids: cleaning and buying their favorite foods. After he finished working, he realized he lost his favorite watch. The watch was a gift from his wife when their first child was born. Joe loved the watch very much, especially after his wife's death. He was very upset about losing it.

    Once his grandchildren came, they promised him they would find the watch.

    One granddaughter asked: "Grandpa, do you remember when you saw the watch last before it went missing?"

    "I guess when I was cleaning the barn(谷仓)!" Joe replied.

    The children looked for more than two hours with Joe, but they could not find it. The kids were now also sad, but they tried to comfort(安慰) their grandfather.

    One grandson went back to the barn to search again. Joe asked why he was going there a second time. But the little boy just asked the others not to follow him and to remain silent.

    He was there for about fifteen minutes and then rushed to his grandfather. He found the watch and happily gave it to Joe.

    Joe was surprised and asked how he was able to find it. The little boy replied: "I sat there without making a noise, and the barn was so silent. After a few minutes, I heard the ‘tick, tick' sound and found the watch."

    Joe hugged and thanked the little boy.

    Doctor Seuss was born in 1904. By the middle 1950s, he had become one of the best-loved and most successful children's book writers in the world. His books are very popular with young readers. They enjoy the invented words and the pictures of unusual funny animals and plants.

    In 1954, life magazine published a report about school children who could not read. The report said many children's books were not interesting. Doctor Seuss strongly hoped to help children and decided to write books that were interesting and easy to read. He used words with the same ending sound, like fish and wish. He did not receive training in art. Yet, he drew the pictures for most of his books.

    In 1957, Dr. Seuss wrote The Cat in the Hat. He used less than 230 words to write the book and even a six-year-old should be able to read it. It was a fun story and easy to read. Children loved it. Their parents loved it, too. Today it is still one of the stories they like best. The success of The Cat in the Hat made him want to write more books for children. In 1960, he wrote a book using less than fifty words. The book is called Green Eggs and Ham.

    In 1984, Doctor Seuss won a Pulitzer Prize (普利策奖). He was honored for the education and enjoyment his books provided American children and their parents.

    He died at the age of 87, but his influence remains. Millions of his books have been sold worldwide. People say his books helped change the way American children learned to read. Yet, his books are loved by people of all ages. Doctor Seuss once said, “I do not write for children. I write for people.”

C

    TF boys, a boy band that has three middle school students, many people like them very much. The band name TFBOYS means The Fighting Boys(拼搏少年).

    Wang Junkai, 14, from Chongqing. Wang is a student at TF-Entertainment when he is 8. He still goes to school like other kids on weekdays. But his weekends are busy with training(训练) classes. He learns how to sing and dance. Many boys can't do it, but Wang can.

    Wang Yuan, 13, from Chongqing. Fans like to call Wang “Er Yuan” because he is a funny boy. Because he likes telling jokes(笑话). The boy's life is easy. His phone is only 300 yuan.

    Yiyang Qianxi, 13, from Hunan. Yiyang is short. He is a good student. He is a great dancer. He joins in TV shows. He plays different roles in many movies. He is good at calligraphy(书法). When other children show their new clothes on Weibo, Yiyang shows his calligraphy work. How can he be good at so many things? “I am practicing dancing when others are playing.” he says.

B

    Recently，there was a report about a special app called "notOK"．A 13-year-old girl Hannah Lucas and her brother Charlie put their heads together to create this app last year．

    Hannah has been suffering from an illness that causes her to pass out since she was little．This is very dangerous if there is no one around．She was also being bullied(欺凌)by some students at school．So she searched for an app that would allow her to press a button so that a friend or a family member would know immediately that she needed help．After realizing there was no such thing，Hannah and her brother decided to do something about it．After some research，Hannah made some early drawings of what the app might look like．Then，after taking a programming class，Charlie began to think about the best way for the app to work．

    They wanted something that would send a text message to up to five contacts that reads："Hey，I'm not OK．Please call me，text me，or come and find me"，along with a link to the user's current GPS location．

    They started looking for someone to help them make the app．And when Hannah shared her dream with people in a summer business class which she attended two years ago，they were really excited about the app．They thought of many different marketing ideas．By mid—December last year, "notOK" app was finished as a birthday present for Hannah from Charlie．"It was exactly what we wanted，"Charlie said．

    In today's age，most people will agree that apps like these are great．Whether you're suffering from illness，or anything emergent(紧急的)，writing a text message or making a phone call to get the help you need can be difficult．

    Hannah is happy to know that her app will help more people．"It's like I went through my dark times so I could help people through theirs，"she said．