The number of students in our school five hundred.
—Would you like to go to the party?—I’d like to, ____ I’m busy. I’m afraid I can’t join the party.
— Kids, I am too busy to help _____with the work.—OK. We’ll do it _____.
Lucy’s mum often makes her the housework after school.
—Where are you going?—We are going to _________
History is an interesting subject. We can learn _____ the past.A. of B. about C. for