Ben must do his homework.
He mustn't play computer games all day.
Dasha must wakes up at 8 'o clock.
She mustn't go to bed at 12'o clock.
Vera must give her pet food and water. She mustn't hurt it.
Dave must go to school every day.
He mustn't play on lessons.
Lisa must clean her teeth every evening. She mustn't eat too much sweets.