—______ you please tell me something about the life in Canada? — Sorry, I______ . I don’t know either. I’m from Australia.

---Do you know why Anna hasn’t come to school today? ---I’m not sure. She _______ be ill.

—Where did you get this book?—I picked it up from a second­hand bookshop if you ________ know.

House owners        keep their gardens in a neat and orderly state according to the regulations.

John, look at the time. ____ you play the piano at such a late hour?