Вставте: must, have to, should, ought to:
1) I... clean my room. I always do it on saturday
2) I...to clean my room tomorrow
3)My granny is in hospital. I...visit her
4)You...to see "Titanic" - it's a great film
5) This is a terrible party, but it's getting late and we...to go home
6)You...watch TV for so long
7)This is a lovely party, but it's getting late and we...to go home
8) You...phone home now. I don't let you
9) You...to phone at once. It is not necessary.
10)Alice wants to improve her English. She...work harder