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**Exercise 8. Choose the correct answer A, B, C or D to fill in each blank in the following passage.**

There are a lot of pastimes that young people like, and one of (1) __________ is mountain climbing. It is an active leisure activity that people can do either indoors or outdoors. If you go climbing outdoors, it’s a great way to (2) __________ your strength and enjoy the nature at the same time. You can even set up your own climbing wall in your backyard or (3) __________ your home. This way you don't have to go out and still can (4) __________ fit and enjoy the activity.

So how can you start mountain climbing? Many people take a class to learn how to climb and use their equipment (5) __________. Others join climbing clubs to make new friends with the same interest and go climbing together. If you are an active person and like outdoor activities, (6) __________ don't you try this activity?

1. A. them B. they C. theirs D. their
2. A. decrease B. reduce C. increase D. raise
3. A. indoor B. inside C. within D. among
4. A. keep B. stay C. go D. give
5. A. effective B. effect C. effectively D. effectiveness
6. A. what B. why C. how D. when