finish the task in two days, you will be fired.

They have never been to Hong Kong, ?

cities are Shanghai and Tokyo?

    The students were having their chemistry (化学)class. Miss Li was telling the students what water was like. After that, she asked her students, "What's water?" No one spoke for a few minutes. Miss Li asked again, "Why don't you answer my question? Didn't I tell you what water was like?"

    Just then a student put up his hand and said, "Miss Li, you told us that water has no colour and no smell. However, where to find this kind of water? The water in the river behind my house is always black and it has a bad smell." Most of the students agreed with him.

    "I'm sorry, children," said the teacher, "Our water is getting dirtier and dirtier. That's a problem."

    When a fire begins, we must tell the firemen. Do you know how to do this? Go to the nearest telephone and dial the number 119. When someone speaks, tell him about the fire. Speak slowly and clearly. A fire engine will arrive quickly. The firemen know what to do. They have long ladders to reach the high windows. They try their best to rescue the people who can't get out. If some people are hurt, they will be taken to hospital in an ambulance. After all the people have been saved, the firemen put out the fire. Sometimes it is very difficult because some people put things in corridors and on stairs. Then the firemen can't get past to put out the fire. If you want to be a fireman, you must be strong and healthy. A fireman has to be able to carry heavy things. He has to be able to climb ladders and to work in high places. So he also has to be brave (勇敢的).

—Only an hour's ride.