All the students agreed to go to Qingdao by ______ sea and camp by ______ sea.
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.