It's still dark. It ____ be 11am!
can't
They've lived in London for 20 years, so they _____ speak English.
must
"Someone's coming." "It ______ be Jenna, she usually gets home at this time."
could / might / may
He works in a hospital. He ____ be a doctor.
might / could
Their umbrellas are wet. It ____ be raining.
must
I ____ see you later, but it depends on what time I finish here.
might
The operation was completely successful! You ____ be really pleased.
must
He's very ill and he ____ need a transplant. The doctor isn't sure yet.
might
I played football yesterday and I'm tired today, so I _______ play later.
might not
I don't think we'll win, but perhaps we _____!
might
That _____ be Jack. He's too tall and Jack hates baseball caps.
can't
He goes running every day. He ______ be very fit.
must
"Whose is this science fiction DVD?". "It ____ be my dad's, he hates sci-fi."
can't
She's been in hospital for a week. She ____ have a serious illness.
must