Ex. 1 Choose the right form.
1. I(were sleeping, was sleeping) when the dog started barking.
2. When she (heard, was hearing) the news, she phoned her son.
3. Mother (was cooking, cooked) dinner at 12 o'clock.
4. We (went, were going) to school when we ( were meeting, met) our friend.
5. They ( were wanting, wanted) to do homework at 4 o'clock after school.