Can or Must | Modal Auxiliary Verbs Exercise

Fill in the blanks with can or must.

1. That is ridiculous. You ……………………….. be joking.

2. There is the doorbell. Who ……………………….. it be?

3. It ……………………….. be Susie. She is in Toronto. (can’t / mustn’t)

4. What ……………………… I do for you?

5. The refugees have already run out of food. They …………………………. be starving.

6. I am not free at the moment but I ……………………………. talk to you at lunchtime.

7. Indians ……………………………. visit Nepal without a visa.

8. We are going skiing on the weekend. That ………………………… be exciting.

9. If she left home at six, she …………………………. be here soon.

10. The doctor said that I ……………………………. lose weight.

11. …………………………. you see the bird on that branch?

12. …………………………. I talk to the manager?

Answers

1. That is ridiculous. You must be joking.

2. There is the doorbell. Who can it be?

3. It can’t be Susie. She is in Toronto.

4. What can I do for you?

5. The refugees have already run out of food. They must be starving.

6. I am not free at the moment but I can talk to you at lunchtime.

7. Indians can visit Nepal without a visa.

8. We are going skiing on the weekend. That must be exciting.

9. If she left home at six, she must be here soon.

10. The doctor said that I must lose weight.

11. Can you see the bird on that branch?

12. Can I talk to the manager?