Unit 3 Стор. 32 - 42: 5

5. a) (1) prefixes; (2) im; p: polite, (3) ir, r: relevant.

b) dependent – independent; polite – impolite; do – undo; zip – unzip; moral – immoral; relevant – irrelevant; responsible – irresponsible; familiar – unfamiliar; human – inhuman; regular – irregular; possible – impossible; happy – unhappy.