Answer:
1. The book, which I read last night, was very interesting. (Adjectival clause: which I read last night)
2. The woman, whose car had broken down, was walking along the highway. (Adjectival clause: whose car had broken down)
3. team, that won the championship last year, is expected to repeat their success this year. (Adjectival clause: that won the championship last year)
4. The painting, which was created by a famous artist, was sold for millions of dollars. (Adjectival clause: which was created by a famous artist)
5. The house, where my grandparents used to live, has been vacant for years. (Adjectival clause: where my grandparents used to live)
Step-by-step explanation: