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I'm not sure, but the new assistant _____ be Italian. Her surname is Rossi.
can't
might
might not
must
You _____ been very busy at work. You was on Instagram for the whole afternoon!
can't have
can't has
He lived in Argentina for five years so he _____ speak good Spanish!
can't
must
might not
might
The streets are white this morning. --> make a deduction
possible answer: It must have snowed last night.
Make a deduction: Jack's computer’s on.
possible answer: He must have forgot to switch it off.
Make a deduction: I can’t find my ticket
Possible answer: I might have left it at home.
Make a deduction: I don’t know why Neil didn’t come to the concert last night.
Possible answer: He might have worked late.
