Complete the dialogues with must, might/may/could, can’t or might not.

1
A: Who is this woman in the photo? Is it the famous actress who played an undercover MI6 agent in Atomic Blond?
B: No, it .... be her. She's blond. Oh, I know! It .... be SoSo, this famous Youtuber.
A: Well, yeah... I guess it .... be her. She looks a bit older, though.
2
A: What are these police officers doing outside my neighbour’s house?
B: I suppose they .... be watching the area. There’s been a number of pickpocketing incidents around here.
A: But Mr Dilks .... be involved with them! He’s such an honest man.
B: Well, you never know. He .... or .... be one of the suspects. We must wait and see what happens.
3
A: Where’s Timmy?
B: I’m not sure but I think he .... be in his room upstairs. He .... be rehearsing his role for the school play. He stars as a lawyer who is defending a serial criminal.
A: You .... be serious! Timmy neither looks nor speaks like a lawyer!