1. it's not (good, well) for you to smoke. 2. he often speaks (angry, angrily). 3. it isn't (bad, badly). 4. he wrote his dictation (bad, badly). 5. this is quite (clear, clearly). 6. the weather is (cold, coldly) today. 7. this is a (comfortable, comfortably) chair. 8. the ice is (dangerous, dangerously). 9. my opinion of this book is (different, differently) from yours. 10. the children seem to be very (happy, happily). 11. the box is too (heavy, heavily). 12. she looked round (helpless, helplessly). 14. his voice is always very (quiet, quietly). 15. do you (serious, seriously) want to go there? 16. it's a very (serious, seriously) thing. 17. your answer isn't quite (exact, exactly). 18. i don't know (exact, exactly) when he will come. 19. the weather during the last few days has been (perfect, perfectly). 20. the work is done (perfect, perfectly).
2. angrily
3. bad
4. badly
5. clear
6. cold
7. comfortable
8. dangerous
9. different
10. happy
11. heavy
12. helplessly
13. предложение под номером 13 отсутствует, если напишете - отвечу
14. quiet
15. seriously
16. serious
17. exact
18. exactly
19. perfect
20. perfectly