—Is that Tom in the teachers' office?--No, it ________ be him. He's gone to the hospital.
I’m sorry, I____________ the book in my home.
Must we find out the reason today? - No, you _____.
She uses her car _____________ for driving to work.
They’re ________little sheep __________ they should be looked after well.
I like playing computer games, _____ I don’t have much time for it.