II. Choose the right modal verbs:            1. You must/ have to/ should be careful with this weapon.
           2. We must/ have to/ should help our friends with their school examination.
           3. You shouldn`t/ mustn`t/ don`t have to smoke here. It`s prohibited.
           4. What do you think should/ do I have to/ must read this book? I have found it in a book store.
           5. You mustn`t/ shouldn`t/ don`t have to talk like this to your parents!​