Every time we get on a plane, we’re asked to neither turn off our phones or change it to flight mode - it’s for “security reasons”. But actually, have to turn our phones off on a plane is a service issue, not a safe one. When we speak on our phones in air, the aircraft’s radios can be disturb. Pilots can hear this interference in their headphone. Though speaking on a phone during a flight isn’t dangerous, but it isn’t a good idea. Now things are beginning to change. The breakthrough could be “pico cells”, that are small cell towers on the plane. One day, perhaps, we will be chatting in the air as many as we chat on the ground.

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Nowadays many people drive instead of taking a bus or walking to work. It causes more traffic accidents. As the student, what can we do to guarantee our safe? First of all, the traffic rules must be strict obeyed. When we cross streets, wait until the traffic light turn green. Next, don't forget walk on the pavement. Finally, I think it very dangerously to wear headphones while walking or cycling, Since we can't pay enough attention on the traffic around us, so accidents may happen. Taking good cure of ourselves and don’t let our parents worry about them.

These days, breaking traffic rules and littering were not uncommon, causing serious harms to life and the environment. That requires lots of effort to change this situation on the part of everyone. As for me, I should start from little things and it won’t be long since I acquire good habits. If I ride a bike, I’ll always keep to the right but never cross a road until the traffic light turns green. If I walk, I’ll never forget use the pedestrian crossing. Meanwhile, I will regard it as my duty to help keep our environment clean and health. Not only will I keep myself on littering and spitting, I will also help clean up the roadside litter whenever be possible. I hope my behavior will make the difference.