Ответы
Exercise 2 - Now complete the blanks with must, should, shouldn't, or couldn't:
1. I'm so thankful for your help with this project. I couldn't have done it without you!
2. The repairs I made should have fixed the problem, but they didn't - so I'll have to take another look.
3. It must have rained a lot last night - there are puddles everywhere.
4. I shouldn't have watched that horror movie; it gave me nightmares.
5. We should have known about this; nobody told us anything about it.
6. If you've been trying to lose weight, then you really shouldn't have eaten all that ice cream.
7. He couldn't have finished a 500-page book in a single day!
8. She never showed up. She must have forgotten about our appointment.
9. He broke two of the plates while washing the dishes. He should have been more careful.
10. They ate every bite of their dinner - they must ＿ have enjoyed the food.