2. Выберите правильную форму глагола.1.You must be / can't bevery proud of your son winning so many prizes.2. We thought our cousins would visit us when they were in town last week, but they didn't even phone. I suppose they must be / must have been too busy.3. The film has been such a big success I guess it must be / can't be easy to get tickets to see it.4. I'm sure you could mend this if you really tried. You must be / can't be using the right tools.5. I've just rung the garage to check whether they've fixed my car, but I can't get an answer. I suppose they may have / may be having a tea-break out in the yard.6. I don't know why you wanted to stay at that party. You might have enjoyed / can't have enjoyed talking to all those boring people.7. I can't go out this morning. We're getting a new sofa and the store may be delivering / must be deliveringit today.8. You'll have to check these figures again. They're not accurate. You might have been concentrating / can't have been concentrating when you added them up.9..You must be / must have been thirsty after carrying those heavy boxes. Shall I make some tea?