Simon hardly listened to his teachers or worked hard in class. For him, talking was so much better. He never stopped talking. He wanted to be heard. “If you listen carefully, you’ll learn something.” Mrs. Jacobs told him many times, but it didn’t work.

Last Sunday, Simon had a sore throat (喉咙痛) and he lost his voice the next morning. “Can I stay home?” he tried to ask, but words didn’t come out. His mother thought he could go to school. He felt upset.

When he got to school, he didn’t say anything to his friends or teachers. Everyone started talking at once. They were excited, worried and surprised. Mrs. Jacobs seemed happy. Simon was bored because he couldn’t talk.

But it wasn’t so bad. He could do his homework. The next day, even though his voice was coming back, he stayed quiet again. He listened and put up his hand to speak. What a great difference!

Scientists think that many animals cannot see colors. The world is black and white to them. Scientists want to find out if dogs can see colors. When the scientists give the dogs food, they show them a certain(某种) color every time. The dogs get ready to eat when they see this color. The scientists then show the dogs another color. Again the dogs get ready to eat. The colors are all the same to them.

Colors are not all the same to monkeys. For example, if we put food in a red box, and do this every day, a monkey will always go to the red box to get food. If we put food in a blue box, the monkey won’t go to it.

Last summer, Jeff became a middle school student. He was a good student, and he always worked hard. He had a test in the first month and he finished the questions easily until he read the last one: “    16     What’s her name?”

Of course, this question was a little special.     17     She was tall and her hair was dark. But Jeff didn’t talk with her and didn’t know her name. The test was over.     18     Then a student asked the teacher, “Is the last question very important in this test?”

“Yes,” said the teacher. “In our life, we will meet many hard-working people. They are important.     19     We may smile at them or say hello to them.”

    20     He also learned that woman’s name later. It was Kathy.

Sam is a 9-year-old dog. He has a _________: painting. The hobby not only makes him famous, but also makes him _________.

Sam has drawn 22 paintings. _________ of them are abstract (抽象派的). He likes to start with darker colors _________ moving on to lighter ones.

Sam’s paintings are _________ in the US. Some of them sell for _________ $1,700. A woman even bought one _________ a birthday gift for her dog.

“He loves painting and always paints for hours,” said Sam’s owner, Mary.

Sam was once a rescue (搜救) dog. One day, Mary wanted to teach him _________.

“I _________ dolphins paint and elephants paint, so I thought that maybe my dog could paint, too,” said Mary.

She is right. Now Sam is one of the world’s __________ animal artists. People call him “Da Vinci in the dog world”.

My name is the novel coronavirus (新型冠状病毒). I am very contagious(传染性的).When I live     41     wild animals, I don’t hurt humans. But some people do not respect (尊重) nature. Then, I can jump from animals to humans. People are afraid of me     42     I can make them very sick. I can jump from one person to another, making many people sick. That’s why people stay at home and hide from me. But there     43     many ways to cure (治愈) the sickness. Doctors, nurses and scientists are working very hard to help the sick people. If you     44     want to get sick, you have to:

Don’t go to crowded places.

Wash your hands.

Wear     45     mask when you go out.

I’m afraid that my days will be over soon. People will return to their happy lives。