2 . Everyone has hobbies. Hobbies bring us a lot of _______. For most of us, the activities we take part in are common and easy to do. However, there are other people who like to take _______. They are more interested in doing extreme sports, such as snowboarding, diving and rock climbing.

Many people _______ rock climbing. They can do it indoors on _________ walls or outdoors on real mountains. There are many advantages of rock climbing - it is fun and it also helps people _________ their worries.

The most important equipment to have is good shoes. They need to be half a size smaller than your usual size. The next thing you need is a harness (保护带). This allows you to _________ freely, but will hold you up if you fall. It's important to know how to use your equipment. If you are a _________, it's best to have lessons. A climber with experience can help you a lot when you are learning to climb.

Rock climbing is very _________ for people of different ages. Climbers, however, must be careful not to _________ the mountains. When some rock climbers climb, they sometimes leave a lot of __________ on the mountains. They should take it with them and throw it away into the dustbins. This will let future climbers enjoy a clean environment.