)) 1.i don't think he was there, but i'm not sure. a) it couldn`t have been him b) it might have been him c) it must have been him 2. what does your boyfriend look like? a) he`s tall and has wavy brown hair b) skiing and going to the cinema with me c) he`s clever and very polite 3. what are a) do b) think c)thinking 4. i didn`t sleep last night? a) you could be tired b) you might be tired c) you must be tired