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1. I'll never forget the time when I met you .
2. The village where I grew up was small.
3. 1975 was the year when the revolution took place.
4. I apologized to the woman whom I spilled coffee.
5. They're the postcards, a few of which arrived yesterday.
6. The children sang aloud all night , which kept their parents awake.
7. Maria was angry about the reason which I didn't know. / I didn't know the reason why Maria was angry.
8. The boy whom I talked with looked very scared.
9. She met the students, all of whom returned from London.
10. The only thing that matters is to tell the truth.