Ответ:

2. Is your father at work? — No, he isn’t.

3. Is the museum open today? — No, it isn’t.

4. Are your parents from Belarus? — Yes, they are.

5. Do I like it? — No, you don’t.

6. Are you a teacher? — No, I’m not.

Ответ: 2) he isn’t; 3) it isn’t; 4) they are; 5) you don’t; 6) I’m not.