Laughter is natural for people. We start to laugh at about four months of age. We start to laugh even1 we start to speak.

    Laughter connects us with others. We laugh more when we are with other people. It's difficult to pretend to laugh. Laughter is2. When people pretend to laugh, most people know it's not real.

   When do people laugh?

    Only 10 to 20 percent of laughter is about something3. Most laughter is about being friendly with other people. Most laughter says, "I don't want to4 with you. I want to be friendly with you." This kind of laughter brings people together.

    We often laugh when we feel nervous. In movies, there is often a joke at an exciting moment when everyone feels nervous. It is usually a(n)5 joke, but we laugh a lot. Our laughter helps us6.

   Why doesn't everyone laugh at the same joke?

    Not everyone has the same sense of7. Some people think a joke is funny, but other people don't think so. People have different ideas about what is funny.

    Our idea of what is funny changes with8. For young children, the world is new. They are interested in many things, so they laugh9. Teenagers often laugh to protect themselves. Adults laugh at themselves and other people with similar problems. They laugh at things that give them stress. Our10 for laughter change gradually.

请以"How to Spend a Meaningful Weekend"为题，写一篇英语短文。

写作要点：（1）帮助父母做家务，如：洗碗、扫地等；（2）锻炼身体，如：跑步球类运动等；（3）发展特长或提升自己，如：阅读、绘画等；（4）适当放松自己，如：听音乐、看电影等。

How to Spend a Meaningful Weekend

Life on weekends is an important part of our daily life.How to spend a meaningful weekend？Here are some suggestions.

"Vegetable BasketLine"

In southwest China's Chongqing, more subway lines are rolling out(延伸) to the rural areas(农村区域) around the city, particularly(特别是) Line 4. Known as the "Vegetable Basket Line", Line 4 connects the city's northeast Shichuan town to the city center. It has a total length of 32.8 kilometers and 15 stations. Since its opening in 2022, it has offered local farmers near the town more ways to sell their vegetables. The vegetables used to be sold at low prices in the town. But now they can be sold at higher prices in the city.

Every morning around 6 o'clock, the Shichuan town station is crowded with farmers. They carry baskets(篮子) filled with fresh vegetables on their backs, or use shoulder poles(肩扛杆) to carry the baskets. The station used to open at 6:15 am. To help the farmers, now it opens five minutes earlier every day.

In Chongqing, people over the age of 65 can take the subway for free. The opening of this subway line helps the elderly not only save money but also save time. An elderly couple in their 80s take the subway to sell vegetables every morning. According to the couple, it used to take them more than one hour to reach the city center as they had to take several buses. Now, by taking the subway, they can get there in less than 30 minutes. And they can sell all their vegetables in less than three hours after arriving at the market.

Almost all animals need to sleep, but some have special ways.

The albatross（信天翁）is one of the largest flying birds. They fly in the sky for months without getting to the ground. They can fly about 22,000 kilometers around the Earth in 46 days! They sometimes even sleep when they are flying.

A flamingo（火烈鸟） can sleep when standing on one leg. The standing leg always stays in the water. The other le g stays close to its body. Its head lies on its back.

Horses often sleep when standing up. If a horse lies down, it needs a long time to get up. A standing horse can escape more quickly when it sees dangerous things. And horses only need about three hours of sleep a day.

Giraffes sleep the shortest time. They sleep about 30 minutes a day, and 5 minutes at a time. They lie down when they sleep. They put their heads on their bodies or on the ground. What an interesting way of sleeping!

My parents always tell me to form some good habits. Firstly, they want me exercise regularly and eat {#blank#}1{#/blank#}because physical health is important. Then, my father wants me to 

{#blank#}2{#/blank#} every penny(便士) I spend. After {#blank#}3{#/blank#}this way, I can learn to save money. Finally, they ask me to read books every week. Books are such valuable resources(资源) that they won't {#blank#}4{#/blank#} in the future by computers. If everyone keeps good habits, his life will be more {#blank#}5{#/blank#}.