1 A That's the second laptop that Jack's bought this year.

B He must have a lot of money then!

A He's a student so he can't be that rich.

B He must have generous parents then.

2 A Do you know where Charlie is?

B Well, he can't be far away. His phone's on the table.

A Any idea where he can be?

B He may be talking to the boss or he can be in the photocopying room. Do you want me to go and look for him?

3 A I have a missed call and I don't recognize the number.

B So, it can be from anyone you know.

A Ah, I know! It's that company who interviewed me last week. They must be ringing to offer me a job. I'm not surprised: I did a really good interview.

B Well, don't be too confident because they could be calling to say you didn't get the job.

A There's only one way to find out!

4 A This steak can't be for me. It looks like it's medium-rare, and I asked for a well-done steak.

B It must be mine, then. I ordered a medium-rare steak.

5 A If they're playing football they must be in the playground.

B In the playground? You must be mad! It's pouring with rain!

A Ok, you must be right there.