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.