WHEN / I / BE / SCHOOL / I / NOT / WEAR / UNIFORM. A. WHEN I WAS A...
22. When / I / be / school / I / not / wear / uniform.
a. When I was at school, I had not to wear a uniform.
b. When I was at school, I mustn’t wear a uniform.
c. When I was at school, I didn’t have to wear a uniform.
d. When I was at school, I didn’t have to wear an uniform.