1. Must I return / Yes, you must.
2. Must I tell / No, you needn’t.
3. Must I make / No, you needn’t.
4. Must I take / Yes, you must.
5. Must I congratulate him? / Yes, you must.
6. Must I make / Yes, you must.
7. Must I eat / No, you needn’t.
8. Must I learn / Yes, you must.
9. Must I do / No, you needn’t.
10. Must I explain / No, you needn’t.