When the teacher walked into the classroom, the students ___________________________ (talk) to each other.

When Kristin called Mark last night, he ______________________________ (study).

Jason ___________________________ (wear) a suit and a tie when I ______________ (see)him yesterday.

While I __________________________ (wash) the dishes last night, I ______ (drop) a plate.

The children ________________________ (come) home while their mother ________________________________________ (cook) dinner in the kitchen.

Yesterday while I _________________________________ (clean) the house I _________________________________________ (find) my money.

While we _________________________ (do) my homework my father came home.

Peter _________________________ (play) football when he ________________ (break) his leg.

Yesterday I _______________ (see) an old friend while I __________________ (cross) the street.

When the alarm clock (ring) _____, I ____________________________ (sleep).

Yesterday David _____________________________ (cross) the street when a lorry ___________ (turn) the corner very fast and almost ___________ (hit) him.

While I _________________________ (walk) to school, it began to rain.

Last night while we ________________________________ (watch) an exciting programme, the electricity _________________________ (go) out.