Hometask  for 5.12

Fill in past simple or past perfect simple.
1. After they saw the Tower, they went to Westminster Abbey.
2. He  asked me which animals I had seen in Africa.
3. After Columbus had discovered America, he returned to Spain.
4. Before they moved to Liverpool, they had sold everything.
5. After he had worked very hard, he fell ill.
6. She opened the box after she  had found the key.
7. They went to a restaurant after they  had sailed.
8. Before they started the party, they had invited some friends.
9. After she had washed the curtains, she cleaned the windows.
10. They went for a sightseeing tour after the bus had arrived.
12. After he  had finished school, he worked for a magazine.
13. They drank a cup of tea after they had  finished lunch.
14. He had asked me for her telephone number before he phoned her.
15. My sister had eaten all the chocolate before my parents came home.