Перевести текст с на .i go to bed at nine o'clock. dolly goes to bed at ten o'clock.

я ложусь спать в 9 часов. долли ложится спать в 10 часов.

я ложусь спать  в девять часов.  долли  ложится спать  в десять часов.

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