1. You () go to all the skiing.

    mustn't

    needn't

2. You () take some snowboarding.

    should

    have to

3. The mountain is dangerous in bad weather, so you () climb it.

    mustn't

    don't have to

4. You () try a new hobby, then you won't get bored in the holidays.

    have to

    ought to

5. You () go to a few classes, then you won't feel so nervous when it is your turn to do the sky-dive.

    must

    had better

6. All racing drivers () wear crash helmets in this competition.

    should

    have to