Electric bicycles have become one of the most popular vehicles（交通工具） in people's daily life， whether in the countryside or in cities． They run on battery operated（用电池发动的） motors． Electric bicycles can run much faster than bikes and they are very easy to ride．

    They were first made in the 1980s in China， but they were not popular at that time． Today， thanks to the improvement on the quality（质量） of the batteries， electric bicycles sell much better． There are over 100 electric bicycles makers in China． Now China is one of the largest makers of electric bicycles in the world， and many people ride them to work， so send children to schools， to go to the supermarkets and so on．

    However， electric bicycles also have disadvantages． The most important one is that they are not safe enough for people who ride them． There are many accidents caused by electric bicycles because of their fast speed． People must be careful when riding electric bicycles． At the same time， people should wear helmets（头盔） when riding electric bicycles． Check the batteries as often as possible． Keeping safe is the most important thing．

（1）Electric bicycles were first made　　in China．

A． in the 1960s

B． in the 1970s

C． in the 1980s

（2）The underlined word "disadvantages" means　　in Chinese．

A． 优点

B． 缺点

C． 型号

（3）To keep safe， people should　　when riding electric bicycles．

A． wear helmets

B． ride very fast

C． make a call

（4）According to the passage， which of the following is TRUE？　　

A． People in the countryside don't ride electric bicycles now．

B． It's not safe enough for people to ride electric bicycles．

C． There are over 300 electric bicycles makers in China．

（5）What is the writer's main purpose in the passage？　　

A． To introduce electric bicycles to people．

B． To talk about the way to ride electric bicycles．

C． To show us the disadvantages of electric bicycles．