Замените глагол must эквивалентами:

1. I must help him. 2. We must meet them at the station. 3. She must do this work. 4. We must thank the engineer for his help. 5. He must come about 5 o'clock. 6. The train must arrive in time. 7. She must make her report at the conference. 8. He must complete his work. 9. They must be at the institute.

1. I have to help him. 2. We have to meet them at the train station. 3. She is obliged to do this work. 4. are obliged to thank the engineer for their help. 5. He should arrive at about 5 o'clock. 6. The train arrives on time. 7. She speaks at the conference. 8. He is obliged to complete his work. 9. They must be at the institute.