Escolha o modal no passado correto
1. The lights are off and nobody answered. They ___ gone out.
2. He ___ taken your keys; he wasn't even in the building.
3. I am not sure where she is. She ___ gotten stuck in traffic.
4. You ___ told him the secret! Now everyone knows.
5. I failed the test. I ___ revised more thoroughly.
6. They ___ arrived by now, but the storm slowed them down.
Complete com o modal adequado no passado
7. She (must have / can't have) forgotten about the meeting — she never misses one.
8. You (should have / must have) locked the door, but you forgot.
9. They (can't have / might have) seen us in the dark.
10. It (might have / should have) rained last night; the grass is damp.