Complete the sentences with the correct form of the verb (PAST and PAST PERFECT) !

1. We on the beach when it to rain (SIT, START).
2. Simon returned the money he a week earlier (BORROW)
3. While I was shopping my purse (STEAL)
4. My letter did not arrive because I to put a stamp on it (FORGET)
5. While he across Central Africa, John caught Malaria. (TRAVEL)
6. When I woke up a man next to me, asking my name. (STAND)
7. When Paula the book, she lent it to me. (READ)
8. Sonia by a car when she was cycling to school. (HIT)
9. I there for three hours when at last it was my turn to speak to the official. (STAND)
10. Frank knew he a terrible mistake as soon as he saw the message "file deleted" on his computer screen (MAKE)
11. When I the curtains this morning, I realised it all night (OPEN, SNOW)