--Listen! Tom is singing in the next room.--It _______ be Tom. He has gone to Shanghai.
The glass of the window is broken. Jim, can you __________ who broke it?
The shop ________ from Monday to Friday. It’s ________ at weekends.
It’s late now, but I still have homework to do.
-- your mother free at the weekend? ---No. She has much work to do.
late for school again?