1. His watch ..................... cost a lot of money. It's made of plastic.

must have

might have

could have

can't have

2. It .................... been very windy during the night. There are branches all over the ground.

can't have

will have

must have

didn't have

3. My father ................ walked to work this morning. His car is still in the garage.

didn't have

won't have

shall have

must have

4. He can't walk. He ............... be ill.

must

mustn't

shouldn't

won't

5. He spends so much money. He ................. be poor.

can't

shouldn't

must

won't

6. You ................. finished that book already. You bought it only yesterday and it is very long.

can't have

must have

should have

will have