--______ have you stayed in this school ? ---For three years.
It’s_____to speak loudly while you are eating.
What_____your cousin that evening?
_____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.