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Hello! My name is Sarah. I'm at home now. I want to1 you around my room.

You can see a bed in the middle of the room. A pair of2 is on my bed. What colour are the trousers? Black. It's my favourite colour. You can see a table in my room too. An3 is on the table. The orange is not yellow or orange. It's green. Look! There is a4 on the wall. It's a map of China. Can you5 China? Let6 tell you. C-H-I-N-A. Next to the map is a picture. It's a picture of a7. My grandparents live on the farm. They have animals like8, chickens and cows. They also have carrot plants, tomato plants and apple trees. Can you9 my schoolbag? It's under the table. There are a lot of10 in my schoolbag. You can see a ruler, three notebooks, a pen, two pencils and a dictionary in it.

You may know a lot about smart phones.But what about smart cities?

Imagine living your life like this: When you wake up in the morning, you say"open the window(窗户)" to the computer and it opens the window. The sunshine is shining and the birds are singing. Then you finish breakfast, sit in front of your desk and begin to have classes through the Internet. With the help of building a smart city, this may come true one day.

A smart city uses digital technologies(数字科技) like an Internet to improve city planning,save resources and make our lives easier. If people live in a smart cities where there is Internet almost everywhere, they can do many things at home, such as booking(预定) train tickets and paying water bills. What a beautiful life it is!

Now China is making some cities smarter.For example, Guiyang is going to build free Wi-Fi in the whole city. Tianjin plans to start a smart city program to solve traffic(交 通)problems. Zhuzhou is making itself smart, too.So everyone in the city should play a role in it.

Online advertising(广告) is the way of selling products(产品) on the Internet. The business world has become digitalized(数字化)1 the arrival of the Internet. Now lots of people would like to buy things 2 , which is easier and faster. Online advertising is also 3 e-advertising. There are many 4 for the coming and development of online advertising.

First, the most important advantage is that people can know the information about the products very 5 wherever they are.

Second, people can see online advertising 6 .

Third, it cuts down the cost of products,7 the company gets more money.

Fourth, small businesses especially find it a good way to 8 things. They don't have to pay 9 for the advertisements.

In a word, online advertising is a cheap and effective 10 of advertising. Its success has so far fully proved its bright future.

He expects that people will be able to fly to other planets    .

I    swimming when I moved to Japan.

Peter watches TV   two hours every day.

You can  more first aid.