Перетворити в Passive
The charity was asking us to volunteer

We were being asked by the charity to volunteer

Объяснение:

это Past Continuous Passive

We were being asked by the charity to volunteer

1. i must brush my teeth. - anyone, most likely some disobedient child.

2. i have to brush my teeth. - a patient of dentist's, a human with diseased tooth.

3. i must tidy my room. - anyone, most likely some disobedient child.

4.i have to tidy my room. - anyone, probably a child.

5. i must take the medicine. - someone with easy form of illness.

6. i have to take the medicine. - most likely, a regular patient

1 - c2 - a3 - f4 - e5 - b

6 - d