1. My co-worker (had not used/ didn’t used) email before, so I showed him how to do it.
2. Because I (hadn’t studied/ didn’t study) for the test, I was very nervous.
3. The wave (had destroyed/ destroyed) the sandcastle that we had built yesterday.
4. When she went out to meet her friends, she (had already done/ already did) all the chores.
5. A waitress brought a drink that I (didn’t order/ hadn’t order) before.
6. (Had you given/ did you give) James a ring before you dropped by his apartment?
7. Susan (took/ had taken) a rest after she had washed all the dishes.
8. When Jim came to the meeting, everyone (had left/ left).
9. Before she had dinner, she (had washed/ washed) her hands carefully.
10. Before I (had gone/ went) out, I asked my parent for permissions.
11. I could not remember the name of the man we (met/ had met) the week before.
12. We (ate/ had eaten) all the cakes my mom had made.
13. Before she (came/ had come) home, she had met some of her old friends.
14. Before Jane (started/ had started) to make the cake, she had prepared all the ingredients.
15. I (had fed/ fed) my cat before I left home.