Ответ:
- Jane was watching TV while I was planting the flowers.
- Ian asked Nina out yesterday but she had already made plans.
- Who were you talking on the phone when I came in.
- Dina had been working on the computer for three hours before she started getting ready to go out with Ian.
- Two days ago Yvonne returned the book I had given her.
- Owen was typing his essay when the computer crashed.
- James had been painting his house for two hours before he took a break.
- I had just finished packing when my taxi arrived.
Ответ: was watching/was planting, asked/had already made, were you talking/came, had been working/started, returned/had given, was typing/crashed, had been painting/took, had just finished/arrived
Великолепно! Ты отлично заполняешь пропуски, используя правильные формы глаголов! Продолжай в том же духе!