What were the pupils doing during the lunchtime? Fill in gaps with the correct forms of the verbs from the box, __________________________

1. Sam was writing on the classboard. He (1) didn\'t see what his classmates (2) were doing at that time.

2. While Pete (3) was reading a book, John (4) came up to him.

3. While Sue (5) was looking out of the window, she (6) saw her friend in the playground. 

4. Bill (7) said hello to Tom, Tom (8) was listening to music and he (9) didn\'t hear Bill.

5. Helen and Laura (10) were doing a puzzle.