Today, an increasing number of people are always looking 1. ______ their mobile phones with their heads down. These people are called the “Heads-down Tribe”. Heads-down tribe members now can be seen everywhere. There are more and more traffic accidents because more 2.______ (drive) use mobile phones while driving. In order to make drivers 3.______ (pay) more attention ______to driving, some new traffic rules have been made.
　　As we can see above, 4. ______(use) mobile phones may cause traffic accidents. Also, more and more 5. ______(interest) and strange facts happen to the “Heads-down Tribe”. 6.______American kept using his mobile phone 7.______the way home. As a result, he knocked into a big lost bear. When he lifted his eyes from the phone, he was so afraid 8.______ he turned around and ran away as 9. ______(fast) as possible.
　　Mobile phones are 10. ______ (help) and necessary tools for modern life. Whether they are good or not depends on how people use them. Let’s be“ healthy” users and try to be the “ Heads-up Tribe”.