
Exercise 4
3D - must, mustn't and needn't / don't have to·Solutions Pre-Intermediate (3rd edition) - Workbook
Question
Decide whether must or have to is better in these sentences.

3D - must, mustn't and needn't / don't have to·Solutions Pre-Intermediate (3rd edition) - Workbook
Question
Decide whether must or have to is better in these sentences.