1.

I once visited a city where the air was not very clean. The sky was not blue, but instead, it looked a bit gray. There was a lot of dust and tiny particles in the air, making it difficult to see far away.

I could feel the pollution in the air, and it made me cough a little. The smell was not fresh like in a park, but more like something not very pleasant. People were wearing masks to protect themselves from breathing in the dirty air.

It was a bit sad because I like places with clean air, and I could tell that the pollution was not good for the environment. I hope that in the future, we can find ways to make the air cleaner for everyone to enjoy.

2.Life in modern cities truly causes a lot of nuisances. In the first place, citizens have to deal with traffic congestion every day. This problem is even worse in the rush hour when so many people run out to work and are stuck on streets for hours. Next, high cost of living is also a serious issue in the city, especially in metropolitan cities. More and more people find it difficult to live on their modest salaries when prices are going up all the time. Financial pressure makes city dwellers become constantly stressed and tired. Finally, the polluted air caused by exhaust emissions from millions of vehicles, construction dust and the lack of green trees negatively affects residents’ health. Many people suffer from respiratory problems such as cough, sore throat or asthma. Indeed, city life brings a number of difficulties as well as challenges to its citizens.

3.As far as you know "space" can mean all things that exist, it is a vast space. The space travel is always a hot topic being put on the screen or hit. top-selling newspaper products in the world. You must have seen many pictures of astronauts suspended in the cabin, eating dishes in small tubes such as toothpaste, drinking water in the form of spheres? And you have always assumed that this is the life of astronauts in space, there are some interesting phenomena happening now in the absence of gravity. On the one hand, the fluids in your body tend to move up above your head, so your facial skin will be inflated like a balloon, and the absence of gravity can make you feel disoriented. A trip into space always has fun things, but there are also some issues that make it difficult for you to stay for a while. However, one thing is for sure that the experiences you have in the universe will be ones that you will never forget

1.My full name is ngoc anh
2. My most memorable axperience is going to the beach with my family. 

3. I changed my learning level. 

4.My family still keeps the studious stories forever. 
5. I didnt take an eco-tour

My parents told me that in the past, I only studied in the morning and picked leaves to feed the cows in the afternoon. At that time, I only studied math and literature. Summer vacation back then was the same as summer vacation now, it's all three months. At that time, every family that had a bicycle was wealthy and the rest had to walk barefoot