Mr. Smith was ill ________. He had to have three weeks ________.
---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.
John is honest boy and good at making airplane model.
---Listen! Helen is singing in the next room.---It ____be her. She has gone to Beijing.