Решение:
Заполняем пропуски глаголами в Past Simple или Past Continuous:
- I was dancing (dance) when the music stopped (stop).
- I was drinking (drink) coffee when the train came (come).
- I first met (meet) my wife when I was buying (buy) shoes.
- I was having (have) lunch when my friend arrived (arrive).
- I was writing (write) an email to you when you called (call).
- I heard (hear) the news while I was listening (listen) to the radio.
- I was working (work) in the back garden when you visited (visit).
- There was (be) a big storm when I was flying (fly) to London.
- My friend gave (give) me a gift when I was feeling (feel) sad.
- A bird landed (land) on her head while I was taking (take) her picture.
- He was working (work) at the post office the last time I saw (see) him.
- It started (start) to snow as I was opening (open) Christmas presents.