Ответ:

1. She was sitting on the bench and waiting for somebody.

2.She met helen when she was walking along the street.

3. We were doing our homework from 5 till 8 o’clock yesterday.

.4. At 8 o’clock he was collecting his car 

5They were playing football from 12 till 2 yesterday

6 He was playing tennis at 5 o’clock yestreday..