A. opens B. is C. widely D. between E. bought “Thank you” is 41 used in a modern society. It is a very good manner. You should say “Thank you” whatever others help you or say something kind to you. For example, when someone 42 the door for you, when someone says you have done your work well, when someone says you have 43 a nice shirt, or your city 44 very beautiful, you should say “Thank you”. It is used not only 45 friends, but also between parents and children, brothers and sisters, husbands and wives. 41 42 43 44 45