题目内容
—Look at the man standing at the school gate. Is he your math teacher Mr. Brown?
—No, it be him. He has gone to Chengdu on business.
A. needn’t B. can’t C. may not D. mustn’t
学练快车道口算心算速算天天练系列答案What can kites do for us? You might think they are just for fun, but kites can do a lot more.
Picture taking: In the1880s,when there were no planes, people used kites to take photos from the air. Those kites carried cameras. People also used them in war. In this way, they got to know more about their enemies.
Science studies: In the early 1900s,scientists from the United States put machines into kites. They used them to learn about the weather.
Life saving: Once some lifeboats on ships from the United States had kites on them. They could send radio messages from the kites. This made it much easier to find people lost at sea.
Fishing: In Asia, people have been using kites for fishing for hundreds of years. Fishing with a kite is far better than you might think. Using a kite, you can place the hook(鱼钩) further away. You can also put it into the water slowly so it will not frighten the fish.
Advertising: Advertisements aren’t just on TV. They can also be on kites! These kites usually carry the name of a product or a company. Advertising kites come in many shapes and bright colors. Some even look like the products!
What to do | How to do it | Advantages |
Picture taking | Take photos from the 1.. | Use kites instead of planes. |
Science studies | Put machines into kites. | Help to learn about the 2. . |
Life saving | Send radio 3. from the kites. | Make it easier to find lost people. |
Fishing | Place the hook slowly into further water. | Be able to fish further away； Be able not to4. fish. |
Advertising | Make kites with names of products and companies on them. Make kites 5. like the products. | Draw more people’s attention. |
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C. 
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C. 