Choose the correct answer:
1. I waited for my friend until he /had come / comes / came.
2. He ran as quickly as he /had been able / can / could.
3. He ran away because he /were afraid / was afraid / had been afraid.
4. He was so tired that he / can / could barely stand.
5. After the rain was over, the sun shone / shined / had shone out again.
6. His health has improved since he / left / has left / had left the city.
7. Whenever we meet we / talk / talked / had talked / of old times.
8. Wherever he preaches, people/ gather / gathers / gathered/ to listen.
9. Galileo maintained that the earth/ moves / moved /round the sun.
10. Newton discovered that the force of gravitation / makes / made / apples fall.
11. He rested his horse because it /limped / was limping / had been limping / for some time.
12. He said that he /had passed / passed / was passing / the examination.
13. The building will be demolished when school year / ends / will end / has ended.
14. She likes to display the miniature spoons she /has collected / had collected / collected / since her marriage to an antique dealer.
15. Suddenly we noticed that the clock / had stopped / has stopped / stopped
16. I never thought I / will see / would see / saw / him again.
17. The woman led me to her hut and / tells / told / has told / me to remain there over the night.