Do you know Australia was, as a matter of fact,________ used to be a nation of prisoners?

This is useful machine which was made in ________thirteenth century

Mom, my classmates invited me ____ a field trip. May I go with them?—OK.

I don’t think it very expensive to buy a family computer here.—Really? I’ll buy _____ next week.

It is what parents say and do that really matters in children’s character training.—________.