1. Why did she refuse to go to the pictures with you? (see the film)
Because she had seen the film.
2. Why couldn’t you get into the flat? (lose the key).
Because I had lost the key.
3. Why did you come so soon from your holiday? (spend all the money).
Because I had spent all the money.
4. Why didn’t you see Ann on Sunday? (go for the weekend).
Because they had gone for the weekend.
5. Why did you rush to the cloak-room during the first break? (leave the books there).
Because I had left the books there.
6. Why didn’t you ring Tom up? (quarrel with him)
Because I had quarreled with him.
7. Why didn’t Mike bring the photos to the party? (not develop them)
Because he hadn't developed them.
8. Why didn’t you send him a letter at once? (send a telegram).
Because I had sent a telegram.
9. Why didn’t you cook salad? (not buy vegetables).
Because I hadn't bought vegetables.
10. Why did he feel so upset? (lose his job).
Because he had lost his job.