Here are the completed sentences with tag questions:

**Exercise 5:**
1. We should follow the traffic rules strictly, **shouldn't we?**
2. He seldom visits you, **does he?**
3. You have never been in Italy, **have you?**
4. No one died in the accident, **did they?**
5. Nothing is wrong, **is it?**
6. Nobody called the phone, **did they?**
7. Everything is okay, **isn't it?**
8. Everyone took a rest, **didn't they?**
9. Going swimming in the summer is never boring, **is it?**
10. Let’s dance together, **shall we?**

**Exercise 6:**
1. Don’t talk in class, **will you?**
2. Sit down, **won’t you?**
3. Hoa never comes to school late, **does she?**
4. He hardly ever makes a mistake, **does he?**
5. We must communicate with you by means of email or chatting, **mustn't we?**
6. She has got a great sense of humor, **hasn't she?**
7. He ought to have made a note of it, **oughtn't he?**
8. Neither of them offered to help you, **did they?**
9. There will be plenty for everyone, **won't there?**
10. Let’s go out for dinner tonight, **shall we?**