put in necessary modal verbs in the correct.
1.Pupils .... come to school in time
2.Children ... Play with matches
3.I don't go to school on Sudays. I ... get up early in the morning
4.They can't buy a car now,but they ... buy it in 3 months
5. You .... read the book
6. The sick man can sit up today but be .... do it yesterday
7.I need something to write , ... I take your pen?
8. It's better to air the room ... open the window
9. You ... go to bed to late you won't be able to get up early tomorrow.

1)must;2)mustn't;3)needn't;4)can;5)should;6)can't; - be заменить на he7)may; 8)may; - пропущено подлежащее I9)should.