When one door of happiness closes, another opens. However, we often look at the 1 door so long that we can't see the one that has been opened for us. It's true that we don't know 2 we've got until we lose it, and it's also true that we don't know what we've been 3 until it goes away.

    Giving someone all your 4 doesn't mean that they'll love you back. Don't expect love in return. Just 5 for it to grow in their hearts.

    There are many moments in life when you miss someone so much that you want to bring them into your 6 and hug them for real! Dream what you want to dream, go where you want to go, and 7 what you want to be, 8 you have only one life and one chance to do all the things you want to do.

    Happiness lies in those who have cried, those who have been hurt, those who have searched, and those who have tried, for only they can understand the 9 of their lives. The 10 future will always be based on a forgotten past. You can't go on well in your life until you let your past failure and heartaches go.

The "Great Green Wall of China project is over forty years old. In this project, people plant trees in Northern China. Why are trees so important to us? Because it is healthy to live around trees. They can keep us healthy, just like doctors. So, we call them doctor trees. Trees can clean the air. For people in large cities with air pollution, trees can be very important. Workers are planting trees not just in city parks. They are also planting trees along streets to help clean the air. 

Some scientists think that trees not just help clean the air. They are also good for our health. A study shows that people in hospitals feel better when they can see trees from their rooms. And people with trees near their homes usually exercise more. 

Scientists are also studying the healthy effects(作用) of trees on human minds. One effect of trees is that they make people feel happy and relaxed. When people go through the neighborhood with more trees, they will walk slower and talk more often with each other. 

Of course, another good effect is that doctor trees work for free! 

When Dorota Siewert played the piano as a child in Poland, she never imagined she would later develop a connection with the harp that would lead her to many cities and countries in the world, including Shenzhen. Siewert began playing the piano at the age of 6 and continued until 14. When she had the chance to pick.another instrument, she chose the harp for its beautiful shape as well as its beautiful sound. Becoming a harp artist was her dream. During her studies, she began performing in concert. As the only harp student, she got her first job to perform at a hotel in Oman. "I was able to make enough money to buy my own harp!" she recalled.

Siewert had performed in several countries. She enjoyed attracting audiences with her music. In 2016, personal changes forced Siewert to look for work in Hong Kong. She took the chance, which led her to discover information about Shenzhen. She received an invitation from a local school. " On arrival, a dinner at Sea World and the fountain music show were fantastic introductions to the city."

Siewert presently teaches music at Quality School International in Nanshan. She is teaching eight students aged 8 to 11. To encourage more students to choose the harp, she actively guides them in preparing for concerts. "Teaching the harp was my first step to develop greater interest in this wonderful instrument," she remarked. " My pupils' passion for learning encourages me to make this instrument more popular locally." "It's not difficult, it's just unfamiliar." She often reminds her students of the importance of hope and patience." Facing challenges develops a sense of achievement —the most important I hope they take away from my lessons."She said.

Volunteer tourism means travelling somewhere to do charity（慈善） work，and is seen by many people as a more positive and cheaper way to see the world.

By choosing to volunteer during their vacations，people can do anything from teaching in Africa to protecting（保护） animals in South America.

Most volunteer travel programs are especially popular with younger travellers，but some groups like Doctors Without Borders（国界） bring people with certain skills to places where they can help most.

Volunteers enjoy visiting new countries，getting to know the local people and culture，and helping with important projects.Volunteer tourism can also be a good way to learn new skills，and it look s good on university and job applications（申请）.

However，some people see problems with volunteer tourism as it can take jobs away from local workers and give them to people who may not have the training and experience（经验）.

Those who want to try volunteer tourism should think carefully about how they can use their knowledge and skills to help others.It's also important to learn about the country they're visiting，because that will help them understand its culture.

Do you know how to start a club at school? Here are some helpful ideas for you:

He who wants to improve his English can have a look here.