Ⅰ.根据首字母提示及英文释义写出单词

　　1．horizon:_the line far away where the land or sea seems to meet the sky

　　2．route:_a way between two places that buses, planes，ships, etc., regularly travel

　　3．luggage:_the cases, bags, etc. that you carry when you are travelling

　　4．canoe:_a long light boat that is pointed at both ends and which you move along using a paddle

　　5．altitude:_the height of an object or place above the sea

　　6．hike:_a long walk in the mountains or countryside

　　7．raft:_a flat floating structure, usually made of pieces of wood tied together, used as a boat

　　8．extra:_more of something, in addition

　　9．desert:_a large area of land where it is always hot and dry

　　10．maximum:_as large, fast, etc. as is possible, or the most that is possible or allowed

　　Ⅱ.根据词性及汉语意思写出单词

　　11．adventure n．奇遇，冒险的经历→adventurer n．冒险家

　　12．major adj.较严重的，较重要的→majority n．大多数

　　13．tiring adj.令人疲劳的→tired adj.感到疲劳的

　　14．optional adj.可选择的，非强制的→optionally adv.可供选择地→option n．选择权，选项

　　15．organisation n．团体，组织，机构→organise v．组织

　　16．uncomfortable adj.不舒服的，不自在的→comfortable adj.舒服的，自在的→comfort n．舒服vt.安慰

　　17．wild adj.野生的；狂热的→wildly adv.野生地

18．differ vi.不同于，有区别→different adj.不同的→difference n．区别，差异