turn off your cell phone
Nowadys cell phones are becoming more and more popular.Almost everybody has got a cell phone.Of course the cell phones have brought us lots of convenience.We could get massages immediately from our acquantances.The cell phones are just easy to use.
But there're also disadvantages.For example,the phones sometimes would ring out during the class which may completely annoyed the teacher.And it would be very embarrassed when the phone suddenly ring at the meetings.Students in class also like to send messages which would affect their studies.
Well,we may need phones to get touch with our friends and relatives.But it is also very necessary to turn off our phones in some particular occasions.It will cause annoyances if we don't turn off our phones.So,please remember to turn off your cell phone in some occasions to show your politeness!