is your father ? — He is watching TV.

Where did you see him for the first time?– It was in the factory _________ we worked.

____homework is required for a middle school student every day ?—About two hours .

It’s an international school,_____of the students _____ from foreign countries.

What do you think of Ann?—Ann is so careful that she always goes over her exercises to ______ there are no mistakes.