1 those and are
2 that and were
3 is
4 were
5 these
6were
1 Alex was riding his new bike when he saw a strange old man crossing the street.
2. When Ann sent Mike the SMS, he was driving home.
3, The family was having dinner when John arrived .
4. While I was reading a newspaper, the light went out.
5. My mother was cooking Christmas dinner when someone knocked on the door.
6. While he was listening to his friend's presentation about the solar system, an unusual idea crossed his mind .
1-f,2-d,3-c,4-e,5-b,6-g,7-h,8-a