Ответ:

1. You must stop smoking

2.The party was wonderful. You should have come

3.You can fix this problem

4.You should visit your sick friend

5.You should have visited your sick friend, but you haven't.

6.Do not want more tea?

7.I had to do it.

Ответ:

1. You must stop smoking

2. The party was great. You should have come

3. You can solve this problem

4. You should visit your ill friend

5. You should have visited your ill friend, but you didn't visit.

6. Do you want more tea?

7. I was forced to do it.