Exercise 1: Fill in the blanks, using MUST or CAN’T
1. Why is that man looking around like that? He.............. be lost.
2. That woman............. be a doctor! She looks far too young.
3. John always fails the tests, even though he's clever. He............ study enough.
4. The food is really good at that restaurant. They............. have a great chef.
5. Who's that at the door? It ................ be Susie - she'll still be at work now.
6. This ............. be John's house. This house has a red door and it's number 24, just like he said.
7. Julie .......... have much money or she would buy a new car. Her old one is falling apart.
8. He ............. be at work now, can he? It's nearly midnight.
9. What a lot of lovely flowers you have! You.......... really like gardening.
10. David............. drink a lot of coffee. He's finished two packets already this week.
11. This ............ be Jamie's coat. He's tall and this is tiny.
12. Her life _.......... be easy. She has four children and very little money.
13. Where's Lucy? She _............ be at the library, as she often goes there at this time.
14. This bill........... be right! £50 for two cups of coffee!.
15. Emma's amazingly good at the piano. She.......... practise a lot.
16. The car in front is driving so slowly that I think they be looking for something.
17. You've already eaten enough for three people! You........... still be hungry!.
18. This.......... book belong to the library. It's certainly not mine.
19. It only takes three hours to fly from London to Sydney? That _...... be correct!.
20. There......... be something wrong with the fridge! It's making a very unusual noise.
