When you request some help _____, it's________ to say "Could you tell me ... ?"
_____the time I got to the bus stop, the bus had already left.
---Don’t worry. Your brother is coming to help you.---________ he doesn’t come?
---Listen! Peter is singing in the classroom!---It _____ be him. He has gone back to his hometown.
---What are these bottles ?---Drinking water.
There was _____ woman in the room, sitting and looking at me in the dark.