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.

    Americans think much about time. From childhood they learn to {#blank#}1{#/blank#} time. They are taught to be on time to go to school, to work and to do everything. When they are having a good time, they time goes easily. When a person is dying, they say he is living on borrowed time.

    Time is money. Time is knowledge. Time is {#blank#}2{#/blank#}in America. A working American has to work hard for eight hours a day or forty hours a week. This is the working time. In his free time, he also works hard for more money. Even on Saturday and Sunday he also works hard as {#blank#}3{#/blank#}. In the street you can hardly see a man walking{#blank#}4{#/blank#}. They walk very fast. In fact, they are running.

    They love time because time can bring them money and lots of things.{#blank#}5{#/blank#}sometimes they also hate time, because they feel they have become servants of the clock.

Nowadays, "toilet revolution" is a thing in China.China isinvesting seven billion yuan in the project.The money is spent building or upgrading(改进) toilets in 30,000villages.

Experts have agreed that a "toilet revolution" is very important.Bettertoilets mean healthier lives and better living standards.Better toilets can alsohelp encourage tourism and improve the economy.

"Toilet revolution" was started in 2015.Chinese president Xi Jinpingthen called for improvement to toilets across China.The government has investedmore than 1.6 billion yuan in the project since then.Nearly 70,000 toilets havebeen built or upgraded.By the end of 2017, 45 percent of rural residents (居民) had been usingstandard toilets.In 2013, that number was only 36 percent.

In cities popular with tourists, more expensive toilets have been built.Thesetoilets have ATMs, Wi­Fi and recharging (充电) stations for mobile phones.Some toilets, meanwhile, havebeen expanded (扩大). Now, they have special cubicles (隔间) for the disabled and adults with young children.

China, in fact, is not alone in focusing on toilets.According to Bill Gates'foundation, forty percent of the world's population doesn't have flush toilets.UNICEF(联合国儿童基金会) says atleast 1.2 million young children die of diarrhea each year.Contact with human wasteis the main cause.Gates says toilets of the future will be able to save 800 livesevery day.

With the growth of pet owners as well as the rise of "Its Economy?，pet cafes, a new business model, are becoming increasingly popular across the country.

For Yu Miao, a cat owner in Hangzhou when she chooses a coffee shop, what matters most is whether it is pet-friendly. ‘There are so many coffee shops in Hangzhou. As a cat owner, I sometimes take my cat out, and I would like to choose a coffee shop that allows my cat to be with me in it," she said.

China's first cat-friendly coffee shop opened in Guangzhou in 2011. With the number of animal lovers like Yu growing in recent years, pet-friendly coffee shops are sprouting up like mushrooms after a spring shower. In February this year, there were more than 4,000 pet-friendly coffee shops in China.

With the development of pet ownership market, pet-friendly coffee shops in other cities are also enjoying wide popularity." During weekends, sometimes visitors have to wait in line before being seated. As customers are all here to enjoy themselves with animals, they think the experience is worth the visit.'' said a pet-friendly coffee shop owner in Beijing.

In Shenzhen, Heytea runs a pet-friendly theme store in Xihui city, Luohu District. The theme store meets nearly all the needs of pet lovers and provides them with a fantastic experience. 

Pet-friendly coffee shop can be mainly divided into two types. One keeps cats and dogs in the shop and enables customers to play with them. Customers need to pay for admission fees in addition to the costs of drinks and snacks. Taking Shanghai as an example, admission tickets for time- limited cat cafes are from 40 yuan to 200 yuan per hour.