Here I want to tell you some informationabout water.

    Water covers most of our planet. People canfind it in oceans, lakes and rivers, and under the ground. Water moves in theenvironment by evaporation, condensation, and precipitation. The warm Sun helpswater change into vapour and rise up into the sky. It is evaporation. Thevapour in the air forms clouds in the sky. It is condensation. When the cloudsget heavy enough, the water falls back to the ground as rain or snow. This isprecipitation.

    Ocean water has too much salt in it. Muchof the water travels far over the land. When it travels over the land, thewater picks up salt from the rocks and soil. About 97.5% of the Earth's wateris salty water. It is expensive to take salt out of the water.

    All people need clean water. They need itfor drinking, for cooking, and for bathing. Some people in a village in SouthAmerica did not have clean water. Their water was full of oil and dirty things.People there got sick when they drank the water. Other people heard about theproblem. They sent empty water tanks (储水池) tothe village. Rainwater fell into the tanks. Now the people in that village havethe clean water.

Singapore is a city of different cultures. Walking through the streets of Singapore, you can{#blank#}1{#/blank#} (听到)different languages spoken, such as English, Chinese and Malay. People from different cultures live and work peacefully with each other and share their traditions.

In Singapore, cultural differences are shown in building styles, shops and in many other ways. Take food as an {#blank#}2{#/blank#} (例子), each culture has its own place to sell their traditional food, but there are also the {#blank#}3{#/blank#} (著名的) hawker markets. Different foods are sold in these {#blank#}4{#/blank#} (繁忙的) markets.

And these are very {#blank#}5{#/blank#} (受欢迎的) with Singapore citizens and {#blank#}6{#/blank#} (游客) from around the world. The food is good and very{#blank#}7{#/blank#} (便宜的).

Singapore is also an interesting city. Large numbers of people, ideas, etc, are mixed together {#blank#}8{#/blank#} (在……下面)the same sky. English is used for business, {#blank#}9{#/blank#} (虽然)the official language here is Malay. Now, however, there is a strong Chinese business community and also a growing Indian business community. Singapore welcomes talented people from around the world and {#blank#}10{#/blank#} (希望)they will live there all their lives.

Is your food and drink healthy? A lot of ice-cream, hamburgers and cola are unhealthy（不健康的）. Meat is healthy but too much meat is not good for children. Cola and candy are very sweet, and too much sugar is bad for you. Eat the right food and be healthy. Carrots, eggs and sweet potatoes are good for your eyes. Milk, cheese and fish are good for your teeth. A bit tired? Have lots of delicious chicken soup! It is important to remember: eat well, stay healthy, and don't get fat!

The following are some suggestions on healthy eating.

● Eat noodles or rice, not hamburgers.

● Have a good breakfast every morning.

● Drink juice, water, tea and milk, not cola.

● Eat lots of fruit and vegetables, not candy or ice-cream.

Would you like to live in a city where buildings turn off the lights for you, and self-driving cars will find the nearest parking space themselves? Although it might sound a little far from you, living in a "smart" city like this could happen sooner than you think. 

The towns that we have lived in for centuries have changed a lot, while completely new cities are being built. One such place is the city of Songdo. In every home there will be a "telepresence" system（远程遥控系统）—allowing users to control the heating（暖气）and locks, take part in video meetings, and receive education, healthcare and government services. Around the city, escalators（自动扶梯）will only move when someone is on them, and offices and schools will all be connected to the system. 

The great mind behind Songdo is from the company Cisco. In fact, technology companies around the world such as IBM, Siemens and Microsoft are already in the business. 

About 75% of the world's population will live in cities by 2050, so cities will need to be more modern to solve the coming problems. "Making cities smarter is one way out, and I think this will in turn make cities greener." said Dan Hill, head of a research company.

My parents will be on business. I will be at home on my own. They worry about me so much. My parents said to me, "We'll go to Beijing for a meeting. It's so important and we can't m{#blank#}1{#/blank#} it. When we're away, you should remember to s {#blank#}2{#/blank#} the door when you're in. And remember to lock it when you go out. Don't let anybody in. Get up as soon as the clock r{#blank#}3{#/blank#}. Also, remember this address and send t {#blank#}4{#/blank#} messages if necessary. "

In fact, I am happy to be alone at home for a few days. In my o{#blank#}5{#/blank#}, being home alone is enjoyable. I can learn to take care of myself. I can also read my favourite books. 

 In a new study, researchers found a fact. Whether it's sports practice, music lessons or a usual catch- up with friends, when children are doing after- school activities, they may feel happier and healthier than those who always look at a screen.

 What's more, children's happiness improved when they joined in after- school activities, while things were completely ▲ when they spent time on social media (媒体) or playing video games.

 The researchers studied 61,759 school students from Grade Four to Grade Nine. They worked out how many days every week children joined in after- school activities from 3:00 pm to 6:00 pm. Then they compared the number to well- being factors (幸福的因素 ) like satisfaction, sadness and worry.

 Lead researcher Dr. Rosa Virgara said the research showed how some out- of- school activities can improve children's happiness, while others, especially screens, can be bad for their mental(精神上的) and physical health." Screens are a big distraction(分散注意力的事物) for children of all ages. Whether children are playing games, watching TV or using social media, there is something about all screens that hurts their happiness," she said.

 The study also showed that even children who were already happy also benefited (得益于) from joining in after- school activities." This shows that there is a big need to find ways to encourage children of all ages and backgrounds to join in activities that keep them away from TVs, computers and smart phones," Dr. Rosa Virgara said.