It can be unsafe to use headphones. You can't hear things that are going on around you. You can't hear if someone walks into your home or if someone is right behind you. This can be very dangerous and you should keep yourself aware of what is around you.

　　1．This passage tells us ________.

　　A. the benefits of using headphones

　　B.

　　the shortcomings of enjoying music through headphones

　　C.

　　some advantages and disadvantages of using headphones

　　D. some measures when you use headphones

　　2．What is the primary cause of listening to music through headphones?

　　A. Walking or jogging to the beat of music.

　　B. The pursuit of better sound quality.

　　C. People's lifestyle and habits.

　　D. Not bothering others.

　　3．Why may using headphones be harmful to our body?

　　A. Because it may cause someone to scream at you.

　　B. Because it may make the eardrums injured.

　　C. Because you may be lost in music and fall over yourself.

　　D. Because someone may walk into your home.

　　4．Which of the following is TRUE according to the passage?

　　A. Headphones may still disturb others.

　　B. Headphones prevent annoying others completely.

　　C. You may be caught singing out loud.

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