A. in front of B. growth C. at the back of D. vocabulary A. tell a lie B. neurotoxic C. grey D. existence A. strong B. do one's best C. shoal D. puzzle A. flu B. entry C. snore D. policeman A. letter B. go to a summer camp C. rice D. sob A. orange B. What's worse C. Dragon Boat Festival D. us A. gather B. fortunate C. technology D. sixty A. discover B. sharpen C. exceptionally D. bedroom A. quack B. visitor C. interest D. outing A. all in all B. Madrid C. seaweed D. fast