Cars are lots of fun, but they could also be dangerous. We have to be careful when we drive them or ride in them.

    It's always a good idea to wear your seat belt when you're in a car. Why? Think about this example: You put an egg on a skateboard and give it a push. If the skateboard hits a stone, it will stop, but the egg won't. It will fly through the air, hit the ground and break.

    Now, think what will happen if you tie the egg to the skateboard. When the skateboard hits a stone， the egg won't go flying. It will stay safe on the skateboard.

    Volvo，a famous carmaker, made the seat belts widely used in the 1950s.

    Air bags are also very important for car safety, because sometimes a seat belt isn't enough. If the car is going really fast and runs into something, seat belts could even hurt the people who wear them. Most new cars have air bags in front of and next to the seats. When a car hits something, its air bags will come out quickly in less than one second to keep the people inside safe.

—Not too much. It's just a second-hand one.

    Amsterdam is the most bicycle-friendly capital in the world. Biking is a fun and an easy way of getting around Amsterdam. Students go to school by bicycle. People ride their bicycles to work. Travellers ride bicycles freely around the city. Even the police work by bicycle. You can see these every day in Amsterdam. There are many roads and traffic signs for bicycles. There are also many places for bicycle parking.

    If you travel in Amsterdam, you don't need to take a bus or a taxi, just ride a bicycle. You can ride the bicycle along the roads and the streets to enjoy the scenery. The city has a lot of bicycle shops to choose from. If you do not want to buy a bicycle, you can go to bicycle rentals（租赁）. They are in almost every part of the city. Going for a ride is enjoyable. It's a good idea to find an experienced guide. Because he would take you to some of the city's most beautiful places. Riding bicycles in Amsterdam is great fun and relaxing；just remember to follow the traffic rules(规则) .

—I'm afraid so. You have no c.

A: Hello, Li Qing.

B: She goes to school by bike.

A: It's the most popular way now. Many students in my class ride to school too.

B:

A: No, my home is far from the school, so I take a bus.  What about you?

B: My home is much farther than yours, so I take the underground every day.

A:

B: Yes, it is. It is very uncomfortable because there are many people.

A：

B: I think it is the most comfortable way, but it's too expensive for me.

A: Yes, I think so.

How do students get to school?

    How do the students in our school get to school every day? Here is the result.

    My name is Jack. My home is about 3 miles1school. I leave2school at about 6：20. I usually go to school3. It takes me 30 minutes. But sometimes I go there 4. It takes5 only ten minutes.

    My friend Bob6Kaishandao. He usually goes to school by boat. He7at 5：30 every day. Then he has a quick breakfast and goes to school at six. First, he8to the river bank（岸）. Then the boat takes9 to school. It usually takes him forty minutes to get to school.

    There're different10to get to school. But I think walking is the best.