Must, can’t, may or might

You __________ very proud of your son winning so many prizes.

We thought our cousins would visit us when they were in town last week, but they didn't even phone. I suppose they __________ too busy.

The film has been such a big success I guess it __________ easy to get tickets to see it.

I'm sure you could mend this if you really tried. You __________ using the right tool.

I've just rung the garage to check whether they've fixed my car, but I can't get an answer. I suppose they __________ a tea-break out in the yard.

I don't know why you wanted me to stay at that party. You __________ talking to all those boring people.

I can't go out this morning. We're getting a new sofa and the store __________ it today.

You'll have to check these figures again. They're not accurate. You __________ when you added them up.

You __________ thirsty after carrying those heavy boxes. Shall I make some tea?