15．How long has Li Chen been skating?

A．For four hours．         B．For one hour．                  C．For five hours．

How much do you know about manners（礼仪）?Different countries have（16）manners．In（17）Asian countries，it is good manners to take off your（18）before you go into a house．（19）in European（欧洲）countries，even if they sometimes become very dirty．this is not done．If you are a（20）in a Chinese house，when you have a meal，you usually do not（21）the food．You often leave a little to（22）that you have had enough．But in England，a visitor always finishes food to show that he has（23）it．We must know the customs（风俗）of other（24），So that they will not think （25）bad-mannered．People all over the world（26）that a well-mannered person should be kind and（27）to others．If you（28）this，at least you will not go very far wrong．（29）likes a person with good manners．but no one likes a person with bad manners．（30） your manners．

14．Who has been skating for four hours?

A．Alison．                    B．Sam．                        C．Sam and Lu Ning．

13．Who was the second to start skating?

A．Alison．                    B．Sam．                        C．Li Chen．

12．How much does one raise for charity for every hour?

A．Five yuan．                B．Twenty yuan．            C．Ten yuan．