Here are the words with different sounds in the part underlined:

1. **A. beds** - different sound (sound of "e")
2. **B. clocks** - different sound (sound of "o")
3. **A. cities** - different sound (sound of "i")
4. **A. grandparents** - different sound (sound of "a")
5. **A. books** - different sound (sound of "oo")
6. **A. poster** - different sound (sound of "o")
7. **B. light** - different sound (sound of "i")
8. **A. television** - different sound (sound of "e")
9. **B. look** - different sound (sound of "oo")
10. **A. clocks** - different sound (sound of "o")

The different sound words are:

1. A
2. B
3. A
4. A
5. A
6. A
7. B
8. A
9. B
10. A