Amsterdam is the bike capital of the world. Biking is a fun and easy way of getting around Amsterdam.

Students go to school by bicycle. People ride their bicycles to work. Travelers ride bicycles     1     around the city. Even police work on bicycles. You can see these every day in Amsterdam. There are many roads and traffic signs (标记) for bicycles. There are also many places for bicycle     2    .

If you travel in Amsterdam, you don’t need to take a bus or taxi, just a bicycle. You can ride the bicycle along the roads and the streets     3     the scenery (风景). 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     4    . 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 of great fun and relaxing; just remember     5     the traffic rules.

Have you ever seen a car without a driver? It sounds crazy, but these computer-driven driverless cars will soon be filling roads near you.

So how do they work? The cars have sensors (感应器) all around. They can help discover other cars and avoid     1     in the road. Sensors on the wheels also help when parking, so the car knows how far it is from the other parked cars. Road signs are read by cameras, and hi-tech systems are used so the car knows how to get to where you are going. All you have to do is type in the address! Finally, a central computer system will     2     all the information it receives from the sensors and work out when to speed up, stop and turn.

Sitting back, looking out of the windows and even watching a film or reading a book while “driving” would be     3     with this new technology. You wouldn’t have to worry about remembering directions. In addition, computers are generally better drivers than humans. They will also drive more safely than people. They will obey the speed limit and have quicker reaction time in case of an     4    .

However, there are many disadvantages of driverless cars. Computers would have     5     making ethical (伦理的) or legal (法律的) decisions; if a child ran into the road, would the computer choose to hit the child or kill the car’s passengers? Should children be     6     in a driverless car by themselves? Or would there need to be a     7     adult with a driving license in the car at all times?

Many people would lose their jobs because of driverless cars. Bus, taxi, train and tram drivers would be     8    .

I’m not so sure about whether I’d want a driverless car - but it’s only a matter of time before they become more common on our roads.