Complete each sentence with the correct form of the verb in brackets.
9. When he was a student, he  (not, have) to wear a uniform.
10. Bell-bottoms were jeans that  (have) wider legs at the bottom.
11. In the 1970s, people  (think) bell-bottoms were cool.
12. Women and men often  (prefer) long hair in the 1960s.
13. In the 1980s, many women  (use) a lot of hair spray.