Complete the sentences with the correct words to express possibility.

1. I can't find my phone. I ... have to buy another one.

2. I ... be a little late for my shift. My bus isn't here yet.

3. I ... go to the cinema tonight. I haven't decided yet.

4. Marie isn't here. She ... be ill today.

5. The bed's empty. ... Mrs Lewis has gone home.

6. Have you lost your notebook? ... you lost it at the reception.

7. A fever ... indicate an infection.

8. I ... go out tonight or ... stay in and study. I haven't decided yet.

9. I ... meeting my friend on Friday morning. I'll check my diary.

10. The baby is crying a lot. ... she has a stomach ache.