[1. can’t be,  2. had to,  3. must have,  4. don’t need/have,  5. must be,      6. Can't be,  7. have to,  8. must be,  9. could be  10. Shall I  11. Can I]  

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Ravi:     Is that your phone ringing, Arjun?

Arjun:    Yes. It Dave. He said he would ring about now. No, wait a moment, it   Dave. That’s not his number. I wonder who it is.

Priya:     You’ll   answer it if you want to know! Who’s that by the window, Ravi? Is it Asha?

Ravi:     It . She’s in New York. She must   go there on business last Monday.

Priya:    Then it her sister or something.

Arjun:   That was someone called Louise on the phone. I don’t know her…

Priya:    But she your number!

Arjun:    … and she says she’s in the café with us. By the window.

Ravi:    Really? Well, she the girl who looks like Asha.

Arjun:  speak to her?

Priya:    You to, because she’s coming over now.

Louise:   Hi, Arjun. I’m Asha’s cousin. She gave me your number.

Arjun:    Have a seat. get you a coffee?