Ответ:

1) 1. desert

2. mountain

3. river

4. cave

5. volcano

6. hill

7. forest

8. waterfall

2)1. deep

2. wide

3. narrow

4. tall

5. dark

6. steep

7. shallow

8. icy

3) 1. boots

2. helmet

3. life jacket

4. paddles

5. safety harness

Mountain biking:2

Kayaking:2,3,4

Orienteering:1

Rock climbing:2,5

4)1.tiny

2.exhausted

3.terrifying

4. starving

5. tragic

6. filthy

7. gorgeous

8. huge

5) 1. completion

2. experience

3. achievement

4.needs

5. argument

6. thunder

7.risk

8. motivation

9. preparation

10. accomplished