下面是今年部分旅游线路介绍及想出游人的兴趣特点介绍.请阅读相关信息并根据出游人的兴趣特点帮他们选择合适的旅游线路。请将答案的字母编号写在答题卷标号为52-55的横线上。
Here is a selection of the tours organized for the coming year:
A:  8 days mountaineering trip--climb Yunnan's third highest peak, the Haba snow mountain. This is ideal for the truly adventurous. You need to be fit and healthy.
B:  8 days cycling tour from Qiaotou Town--visit the spectacular Tiger Leaping Gorge. It is a leisurely tour suitable for anyone who is reasonably fit and healthy. No previous cycling experience is necessary and all our routes are on flat land!
C:  8 days river rafting--white water adventure on the Yangtze from the old town of Lijiang. This adults-only tour is exclusively for good swimmers and physically fit.
D:  10 days rainforest trek(乘牛车旅行)--spend 5 days in the forest and meet the local people. This is a walking tour and no previous experience is needed, just a curious mind and an interest in traditional cultures.
E:  10 days horse trekking tour--visit authentic Tibetan villages of Shangri-la. The ultimate horse-riding experience in a spectacular mountain environment. This trip is for confirmed riders only. Don't expect three-star hotels on this trip.
请阅读以下有出游意向的人的要求，然后匹配旅游线路所适合的出游者。
52. _______ A family of four, including parents, a sixteen-year-old son and a thirteen-year-old daughter, who are looking for a fun holiday. All four are good riders and strong swimmers.
53. _______ A retired couple who are reasonably fit and who want to find out more about ethnic minorities' cultures.
54. _______ A group of four young adults who are into all extreme sports and are looking for something with plenty of excitement. They are more interested in the scenery than in the life style of the locals.
55. _______ A family of five including a ten-year-old girl. They have many different interests and they are looking for a relaxing holiday.