a. I was going (go) to work when my car broke down (break down).

b. I (fall down) when I (clean) the windows.

c. I (study) for five hours and then I (go) to sit the exam.

d. Yesterday I (go) to the cinema and later I (meet) my friends.

e. While I (study) my brother (listen) to the radio.

f. I (not go) to the school because I (have) a terrible headache.

B. I fell down when I was cleaning the windows.

C. I studied for 5 hours and then I went to sit the exam.

D. Yesterday I went to the cinema and later I met my friends.

E. While I was studying my brother was listening to the radio.

F. I didn’t go to school because I had a terrible headache.

Могу и ошибаться. Удачи.