Tenses

1. Many social changes have redefined men's roles in the family. (present perfect)
2. Before the 1970s, few men had studied cooking in school.
3. Women traditionally have had most of the responsibility for keeping house and raising children.
4. The new courses in this area, introduced in recent years, have appealed to more and more boys.
5. By the year 2025, many men as well as women will have used these skills at home and in their careers.