Write the correct form of the verbs in brackets, using may, might, might not, must, can’t, could, couldn’t.

1. Ask Sylvia. She _____ (know) the answer.
2. He _____ (murder) Senator Jones – he was abroad then.
3. I can hear some loud music coming from the other flat – they____ (have) a party again!
4. Look, the light in on in the living room – they ______ (come) back.
5. A: Wow, can you see this beautiful black dress over there? It's Louise, I'm sure.
B: It _________ (be) her. She is much younger!
6. A: They are late. What happened? They should be here already!
B: They _______ (miss) the 2 o'clock train, you know they never hurry. It's very probable.
7. Jack, why didn't you tell me your mother was coming to visit us today? You _________ (tell) me, really!
8. A: I'm sure Janice had an accident because she is never late.
B: Yes, that's right. Janice ______ (have) an accident.
9. He ________(arrive) home. It's only four o'clock.
10. They _________ (be) out. They aren't opening the door when I knock.