Question

He _____ his leg when he _____ in a football match against another school.

　 A. broke; played 　 B. was breaking; was playing

　 C. broke; was playing 　 D. was playing; broke

 

Answer 1

C

 

当主句的谓语动词是瞬间动词，时间状语从句中一般是进行时态。