Here are the correct options for the first section:

1. The plane **WAS FLYING** to Paris when it crashed.
2. The students **WAS WAITING** for the bus when it started to rain.
3. We were crossing when the traffic lights **TURNED** red.
4. When their mother called, the children **WERE PLAYING** games.
5. Sue **WAS WASHING** the dishes when the phone rang.
6. My father **COOKED** lunch when I got home.
7. Jim **BROKE** his leg when he was playing golf.
8. My brother was jumping on the bed when my mum **WAS WALKING** in.
9. Someone **TOOK** Peter's bag while he was making a phone call.
10. When I **ARRIVED**, I went into the kitchen.

For the second section (put the verbs into the past simple or past continuous):

1. When the teacher **CAME** into the room, two boys **WERE PLAYING** football.
2. Peter **TURNED** on the TV, but nothing **HAPPENED**.
3. When Helen **WAS WALKING** to school, she **SAW** the old man again.
4. While Mike **WAS RUNNING** in the park, Mary **FELL** over.
5. At 7:00 Tony **GOT** out of bed, and **WENT** into the bathroom.
6. While Kate **WAS DRINKING** some milk, she **DROPPED** the glass.
7. While I **WAS LISTENING** to music, I **HEARD** the doorbell.

Feel free to ask if you need further assistance!