I’d like to share a story that happened a few days ago but still makes me happy. I lived in    1    (German) at that time of the year. It was cold and the    2     (street) were often wet and everyone liked to get home or to a warm place as quickly as possible.

One evening, I     3     (walk) along the sidewalk when I saw a toy rabbit.     4    (I) first thought was joy, “Oh! Rabbit! Sweet.” Then, trained by small acts of kindness, I wondered     5    I could be of help and who    6    (lose) the rabbit.

Then I remembered that a woman with a carriage had just passed. I picked the rabbit up, called to    7    woman and showed the rabbit to her. She turned around with her sleeping child, checked the carriage, and said    8    a smile, “Thank you so much! You saved my evening!” There was so much joy in her face,     9    (make) me happy still to this day.

And it taught me    10    (be) caring even on the risk of failing.

4 . My great-grandfather, my grandfather and my father are all farmers. My father expects me to become a farmer and_________them all but I don’t agree with my father.

Three years ago, my father took me to a(n) _________to visit one of his friends. His friend_________a small airline. It was the first time I had seen a_________airplane. After my father’s friend discovered I had never been in an airplane, he_________me to fly with them. When we took off, I felt very excited.

Since then, if I had time, my father’s friend would teach me how to fly.He even let me fly_________once. I wanted to become a pilot but to do this, I would have _________my father’s wishes.

At the age of 18 ,I had to tell my father what I wanted to do but I didn’t want to make him_______. As he walked ahead of me and followed, I didn’t know what I could say to help him understand my_________ for flying. I took my courage and said,“Father,I have something__________to tell you. I want to go to college and become a pilot, I have talked to the schools and they agreed to__________me financial(经济的)help.”I felt nervous in his__________. Then he spoke,“I was wondering when you would tell me. I have been__________money for you.” When I heard this, I couldn’t help____________ For the first time I really understand his____________love for me.

8 . Yawning (打哈欠) is something we all do - maybe because we’re bored carrying out boring tasks or because we’re tired. Sometimes, just seeing other people yawn can set you off. But is this biological function really contagious (传染的), and why do we do it in the first place?

Many of us think we open our mouths when we yawn to take in more oxygen, but in fact it appears there is no clear biological reason. According to BBC Bitesize, new research suggests it might be because yawning cools the brain down and prevents it from overheating, much like the fan in your laptop. This might be why we’re more likely to feel sleepy and yawn in warm temperatures.

What is clear is that we yawn more when we’re exhausted and ready for a nap, and we can’t control when we do it - once we start, there’s no stopping us! But it’s also true that yawning is a very contagious behavior. John Drury, a researcher from Sussex University found in his research that there is a connection with our social group and how close we are to the people in it. If we identify with the person who exhibits the behavior, we are likely to copy it too.

Another research by the University of Nottingham in 2017 found similar results. They asked volunteers to watch other people yawn. They found their ability to resist yawning when others around them yawned was limited. And the urge to yawn was increased when people were told they couldn’t. They also found, when using electrical stimulation, that they were able to increase people’s desire to yawn. These findings, they say, could be useful in treating other conditions like Tourette’s, which involve the same area of the brain.

What is certain is that a yawn can creep up on us at any time even when we think we’re not tired -but, I hope, not when you’re reading this article!

A few weeks ago, a friend and I, both travelling in the south of France,     1    (decide) to go to the chocolate festival     2     (call) “Feria du Chocolat” in French. I had     3    fantastic time.

There were stalls (货摊) selling boxes of chocolates, sweets, dessert wines, etc. All the stall owners were very friendly and happy to see the    4     (arrive) of foreigners like us. They explained their methods of    5     (make) chocolate, showed us photos of their factories, and, of course, let us try their products! My friend bought some chocolate cups,    6    I think are great novelties (新鲜事物)- you drink your drink, and then you can eat the chocolate cup !

We then went to a masterclass where we learnt how to make chocolate. I was a little    7    (worry) before the masterclass, as there were only 12 people in a class, and I wasn’t sure if my French would be good enough     8     (understand) everything! Luckily, everyone was     9    (extreme) friendly - the lady next    10    me was making notes of everything we did, so she explained when I didn’t understand. At the end, our class stayed in the room and chatted about how much we were enjoying the day and eating lots of chocolate!

10 . In the coming decade, space agencies and private space companies like SpaceX are planning to build a base on the Moon and Mars. While scientists are already building rockets for the journey, for long-term human settlements on them, astronauts will need fuel to carry out daily tasks. Many have suggested hydrogen (氢). But a group of scientists is working on turning CO2 in the atmosphere into jet fuel. As Mars is rich in CO2 and the lunar surface has a high concentration of CO2, it may be a feasible solution.

For now the team of scientists at the University of Oxford is focusing on making jet fuel for the aviation (航空) industry. As the aviation industry releases over 900 million tons of CO2 every year, to battle climate change, it is necessary to turn the tide. So far aviation scientists have tried to use other energy resources like electricity to fly. But such flights are limited to short distances. For long-distance flights, there is no alternative yet.

The concept of turning CO2 into jet fuel is not new. Previously, other similar methods had to rely on expensive catalysts (催化剂) like cobalt to speed up the chemical reaction. But what Oxford scientists suggest is adding a cheap iron-based catalyst and hydrogen to turn CO2 into liquid fuel. As the process would not require using fossil fuel, it will make the industry carbon neutral (碳中和的).

The scientists tested the new catalyst in a lab at 300°C and at 10 times the air pressure at sea level. The entire process took 20 hours and turned 38 percent of CO2 into new chemicals. About 48 percent of the chemicals were jet fuel hydrocarbon and the rest were other by-products that are used in the production of plastic.

Professor Peter Edwards, a lead scientist in the project, said the new method could be improved in two to three years to produce jet fuel in large quantities. “This is a really exciting, potentially revolutionary advance. Our vision is that the world can see that CO2 collected can be used as an energy carrier to enable sustainable aviation.”