Fill in the blanks with an appropriate modal auxiliary verb.
Answers
1. Don’t throw things out of the window. Somebody could get hit.
2. She cannot be awake. There is no light in her room.
3. There is no light in his room. He must have gone to bed.
4. Students must not take books out of the library.
5. Visitors should not feed or tease zoo animals.
6. There is something under the bed. It could be a mouse.
7. If he had replied to my letter, it should have arrived days ago.
8. Why did you wait for me? You could have gone without me.
9. It can’t be James. He is in San Francisco at the moment.
10. In those days, you could be hanged for stealing a goat.
11. You must be her sister. You look just like her.
12. If she left school at 4, she should be here in half an hour.
