Воткните нужный глагол: didn39;t have to, was to, cannot, must, couldn39;t,

Воткните необходимый глагол: didn39;t have to, was to, cannot, must, couldn39;t, be able to, need to, were allowed, needn39;t, may. 1. The children ... carry this box: it is too heavy.2. You ... work hard at your English.3. It was Sunday yesterday and we ... go to work.4. I ... to wait for her at the station.5. She ... to send a telegram because it was too late to send a letter.6. I couldn39;t understand what he said.7. When her arm is better she ... play the piano again.8. The children ... to watch TV last night.9. Nick ... write to hers for she will be here tomorrow.10. ... I see your garden, please?