1. open the brackets and fill in the blanks with the appropriate forms of the verbs must, have to or be to. 1. tell) him about it. it's a secret. 2. it looks like rain. ) your raincoats. 3. you talk) so loudly here.4. inhis youth he (work) from morning till night to earn his living. 5. he ) at the station till it stopped raining. 6. the secretary informed us when the ). 7. ) on saturday, but because of the delay with their visas ) tickets for monday. 8. tell) him anything about it before they get further instructions. 9. ) for london that night. (do) it all by myself? 11. it was too late to change their plans and up) with it. 12. prepare) all this work, i will help you. 13. stay here till she is free. i think wait) long. 14. ) a series of experiments this week. 15. remember that ) at this place not later than noon.

1. You_must not tell) him about it. It's a secret.
2. It looks like rain. You_have to __(take) your raincoats.
3. You _must __(not talk) so loudly here.
4. In his youth he _had to __ (work) from morning till night to earn his living.
5. He __had to_(wait) at the station till it stopped raining.
6. The secretary informed us when the manager_was to__(come).
7. They__were to_(leave) on Saturday, but because of the delay with their visas they_had to__(book) tickets for Monday.
8. They_are__(not to tell) him anything about it before they get further instructions.
9. He_was to__(leave) for London that night.
10._Do I have to (do) it all by myself?
11. It was too late to change their plans and they_had to__(put up) with it.
12. You__don't have to_(not prepare) all this work, I will help you.
13. Stay here till she is free. I think you_won't have to_ wait) long.
14. We_is to__(conduct) a series of experiments this week.
15. Remember that we_are to__(be) at this place not later than noon.

1. You must not tell him about it. It's a secret.
2. It looks like rain. You have to your raincoats.
3. You must not talk so loudly here.
4. In his youth he had to work from morning till night to earn his living.
5. He had to wait at the station till it stopped raining.
6. The secretary informed us when the manager was to come.
7. They were to leave on Saturday, but because of the delay with their visas they had to book tickets for Monday.
8. They aren't to tell him anything about it before they get further instructions.
9. He was to leave for London that night.
10. Must I  do it all by myself?
11. It was too late to change their plans and they had to put up with it.
12. You don't have to repare all this work, I will help you.
13. Stay here till she is free. I think you won't have to wait long.
14. We are to conduct a series of experiments this week.
15. Remember that we are to be at this place not later than noon.