On the table was a big boxIn a glass of milkBy my bed was a toyNear my computer had a cat.
1)must 2)mustn't 3)must 4)must5)must 6)mustn't
1 will dance
2 will give
3 will become
4 won't fall over
5 won't forget
6 will cheer
On-для обозначения места; времени; сферы деятельности
For-для обозначения цели; компенсации; времени (в значении «в течение»; объекта; причины