You must write modal verb can or can't .

1. The boy ____ run because his leg is broken.
2. She ____ go to the store after lunch. Let's eat.
3. ____ you get the door for me please? My hands are full.
4. They ____ be happily married because they are always fighting.
5. That boy ____ have written this essay. He doesn't have the skills.
6. We ____ go to the movies tomorrow night. Let's stay in tonight.
7. Mom, ___ I watch the football match on TV?
8. Can I go to Steve's tonight after dinner? No, you ____.
9. He's a smart boy. He ____ do multiplication tables and he's only 5.
10. You ____ be serious. There's no way we will finish by then!