I can't find my books but they .......... be a school.
must / might/ could/ can't
My little sister is in a bad mood but she .......... be hungry.
might / could / can't / must
This ............ be for me- I don't like this kind of book.
can't
You.......... be happy with your wonderful exam results.
must
That animal.......... bite you- watch out!
might / could
It .......... be Adele playing the piano. She plays better than anyone in the house.
must
That ......... be the longest snake I've ever seen.
must
You .......... be really excited - you have tickets for your favourite band. (must/could)
must
Everyone's wearing hats and coats. It .......... be very cold.
must
Phil .......... be ill because he isn't at school today. (might/can't)
might
I'm tired. It ............. be time for bed. (must/can't)
must
It .......... be a parrot. It's the wrong colour. (can't/must)
can't
I .......... watch a programme about animals tonight.
Might
I think it ............ rain today - look at the sky.
could/might
Taylor .......... call me later but she's not sure. (must/might)
might