Where are you going _____ vacation?[ ]

My father is used to _______ in the country. He doesn’t want to move to the city.

I sawchildren in the classroom, five boys and seven girls.

Although ________ after the Civil War, the American blacks still took no important role in the white Americans except as servants and laborers.

Would you like to be an actor? —I don’t like acting very much. I __________ to be a director.