1) When John came home, his window was broken and his computer was missing. a) Someone have stollen his computer. b) Someone can't have stollen his computer. c) Someone must have broken into his house. d) Someone must broken his window. 2) Sarah is very angry with her boyfriend. She isn't sure, but she thinks that he _____ (cheat) on her. a) could have cheated b) might have cheated c) may have cheated d) must have cheated e) has cheated 3) That's impossible! You _____ Brad Pitt at Bicentenario Park. a) can't have saw b) can't met c) can't have seen d) can't have see

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