31. Chairs, misteries, negroes, fishes, fruits, wolves, vocabularies, pianos, drills, mice, feet, idioms, days, postmen, skies, zero(e)s, watches, skis, radios, keys, dictionaries, roofs or rooves, kangaroos, oxen, women, geese, leaves, sportsmen, kilos, benches, bushes.
32.
1. strong
2. poor
3. happy
4. hard
5. fresh
6. cold
7. old
8. cool