Question

1. I have to/might finish my homework before I go out.
2. I might/must call them today or it will be too late.
3. You would/must pay for your tickets before you board the train.
4. He revised so well for the exam that he was able to/had to finish before anyone else.
5. He should/might be late tonight.

Answer 1

1. I have to/might finish my homework before I go out.
2. I might/must call them today or it will be too late.
3. You would/must pay for your tickets before you board the train.
4. He revised so well for the exam that he was able to/had to finish before anyone else.
5. He should/might be late tonight.