Answer:
2. Ali let me down where we were working on the project. PC
3. Tim and Nina were dancing when Alex took a video on his phone. PS
4. Maddy was playing hockey when she broke her leg. PS
5. When Ben was waiting for a bus, he saw the girl that he's keen on. PS
6. My mum was working when I phoned her. PS
Step-by-step explanation:
The answers are bolded