2.3.1
1, Unemployed -> unemployment
2, refuse -> refusal
3, invent -> invention
4, electricity -> electric
5, development -> developed
6, day -> daily
7, chemistry -> chemical
8, extinct -> extinction
9, pollution -> polluted
10, unemployed -> unemployment
2.3.2
1, careful -> carefully
2, application -> applicants
3, harm -> harmful
4, possible -> possibility
5, inactive -> inactiveness
6, wide -> widely
7, consideration -> considerable
8, sleep -> sleeping
9, important -> importance
10, attractive -> attractiveness
2.3.3
1, careless -> carelessness
2, success -> succeed
3, economy -> economical
4, peacefully -> peaceful
5, scientifically -> scientific
6, boredom -> boring
7, dangerous -> danger
8, Britain -> British
9, effect -> effective
10, contamination -> contaminated
