—How often do you chat with your friends online?— . I'm busy with my study.
Mike was ________ nervous ________ he forgot to put on his shoes.
After reading the news , he seemed _________.
He often helps the poor children _________ giving the money.
The old lady has ____old house. There are many mice in _____old house.
The number of the students in our school _________ 600, but a number of students _________ living in the school.