A. taught B. sticker album C. napkin D. wood A. dividing line B. aware C. harmful D. mood A. ecosystem B. cyclist C. portray D. play A. viperine B. however C. training D. advantage A. take part B. carnival C. collar D. take part in A. unlike B. ad C. cruel D. hold on A. put to good use B. to start with C. can D. pedestrian A. herb B. cost C. weigh D. slavery A. make effort B. pretentious C. coal D. autumn A. sportswoman B. bottom C. Asian D. pie