B

    I'm David. Long ago I came to the city near my hometown to find a job. I met all kinds of difficulties and I used up all my money soon.

    It was dark outside one day. I got on a bus quietly. Suddenly, a passenger cried in a loud voice, "someone has stolen my money!" I felt nervous, because his money was in my hand. Some people suggested the driver drive the bus to the police station, but some were against it because they were in a hurry to go back home. The whole bus was very noisy. The driver then stopped the bus by the roadside and turned on the lights. At that time, one passenger said, "Turn off the lights and give the thief(小简)a chance to take out the money."Then the bus got dark.

    When I was still thinking about whether to take out the money or not, the lights were turned on again. There was no money on the floor. Someone said, "Give him one more chance." Then the lights were turned off again. I became even more nervous. The lights were turned on again but they got the same result.

    Then the passengers fell into an open discussion. Later, someone said, "Give him the last chance!" I felt awakened(醒悟的) and took out all the money when the lights were turned off again.

    For many years I have been grateful to those who gave me three chances. When the first and Second chances come, you may not be prepared well or don't have enough courage to act. When the third chance comes, you should know clearly what you should do.

根据短文内容，选择最佳选项。

B

    One day a mouse(老鼠)is looking for food. He meets a tiger. The tiger catches (抓住)the mouse. He looks at the mouse and says, "You are too small for me to eat." "Please let me go, Mr. tiger." says the mouse "One day I will help you."

    The tiger laughs, "How can a little mouse help a big tiger?" he says, "OK. I will let you go. But be careful(当心)next time."

    The next week the mouse is again (又)looking for food. He meets the tiger under a tree. The tiger is in a net (网)and can't get out.(出来).The mouse goes up to him.

    "Don't worry(担心). I can help you." He bits(咬)the net. Soon he bits a big hole(洞) in the net. The tiger can get out of the net.

When thinking of the Arctic (北冰洋), some people may imagine an icy land of white snow. And other people may imagine it as the last really clean place left on Earth. In fact, we have polluted the deepest oceans with plastic rubbish, and now, CNN says, "It's the Arctic's turn."

German scientists have recently found microplastics in Arctic snow. Microplastics are pieces of plastic smaller than 5 millimeters. Sadly, the scientists found 1,800 pieces of microplastics per liter (升) of snow. That may cause terrible air pollution. 

How is plastic pollution reaching the Arctic? According to scientists, "It's clear that most of the microplastics in the snow come from the air. They fall off plastic objects and are moved by the wind. They mix with ice in the air and fall to the ground as snow."

Are they bad for us? We do know that our bodies cannot take in "large" pieces of microplastics. However, if the plastics are small enough, they can find ways into our bodies and stay there for a long time, which can be bad for our health. What's more, earlier studies have shown that microplastics may contribute to lung (肺) cancer risk. 

Microplastics have also been found in rivers and oceans around the world. Research has found that they flow over long distances and into our oceans, damaging (损坏) ecosystems along the way. When we wash clothes with plastic fibers (纤维), they start in our wastewater. The wastewater then flows into rivers and out to sea. They are eaten by sea animals there. If people then eat these animals, it means that we're eating the plastic as well.

When Mary was just seven, her family moved to a new city. She went to school by school bus. One morning there was something wrong with the clock. When she got up, it was too late to take the school bus. Her mother said she could go to school in her car. 

"But how can you find the way, Mum?" Mary asked, "You went to our school only once. " "Yes, " her mother answered, "but you take the school bus there every day and you know the way. " "Oh, yes, " said Mary. 

They started out and the car went around most of the city before getting there. When they arrived, her mother found that the school was not really far from their house. 

"Why did you make us go so long a way?" her mother asked her. "Well, Mum, " answered Mary, "I know only this way. The bus always goes like this, so the other children can take it to school. "

Monarch butterflies(帝王蝶) are flying through Missouri(密苏里州) on their way to Mexico. Many American people love to see these bright- colored black- and- orange butterflies, but they need our help to stay safe and healthy.

Every year, monarch butterflies travel south to Mexico in the fall and fly back next spring. As the monarchs go south, people in Missouri might start seeing more of these beautiful things. They' ve already been found in places like Kansas City, and even in smaller towns like St. Joseph.

Sadly, the number of monarchs has dropped by 80% in the past twenty years. Monarch caterpillars(毛毛虫) need to eat milkweed (乳草) to grow. Much of the milkweed in the country is gone because of the overuse of herbicides(除草剂) in farming. Without these plants, monarchs have no place to live or find food.

Monarchs plays an important role because, like bees, they can carry pollen(花粉), which help plants make seeds and fruit. Here are some things you can do to help these amazing butterflies:

Plant Milkweed:This is the only plant where monarchs lay their eggs. By planting milkweed in your garden, you can give these butterflies a place to stop and rest during their trip. You can also plant other flowers to provide food for the adult butterflies.

Take Photos: If you you see a monarch, take a photo and up load it to the Western Monarch Milkweed Mapper. You can help follow the movements of monarchs and understand where they are during the year, which is valuable information for researchers.

Help Fight Global Warming:Changes in the weather are making life harder for monarchs. Bad weather hurts milkweed and when the temperature is too high or too low, it's difficult for monarchs to grow up. By doing things to help the environment, like recycling and saving energy, you can help slow down global warming and protect the monarchs.

①I am John Brown. I am from England. I have a happy family. There are nine people in my family. They are my grandparents, my parents, my two sisters, my brother, my brother's wife and I.

②My grandparents are old and they like planting flowers in the garden. My father is a farmer and he has a big farm. My mother doesn't go to work. What does she do at home? Oh, she does housework.

③My brother is a doctor. He works in a hospital. His wife works in the hospital too. But she is a nurse. My two sisters are students. Helen wants to be an English teacher. Her English is very good. Julia likes to sing very much. She can sing very well. I'm in China now. I teach English in a middle school.

④I have a happy and big family.