21. Mrs. Johnson talks a bit ……….. her husband.             A. less loudly                        B. loudly                    C. loudly than           D. less loudly than 22. Mary sings ………... her sister does.             A. more beautifully  B. more beautifully than     C. beautifully than   D. beautifully 23. Linda dances ……….. than other members in her club.             A. more gracefully   B. as graceful as       C. more graceful       D. as graceful as 24. My new colleagues work ………. my old ones.             A. harder                    B. harder than           C. more hard             D. more hard than 25. At night, you should drive …………. during the day.             A. less slowly            B. more slowly          C. less slowly than   D. more slowly than 26. We remember things …………. when we get older.             A. less easily             B. easier                     C. more easily           D. less easy 27. The cost of living in the countryside is much ………… than in the city.             A. more low               B. lower                     C. as low                    D. the lowest 28. This city has a lot of restaurants and places for entertainment. It’s much ……… my hometown.             A. more convenient B. more convenient than     C. convenient than   D. convenient 29. Susan can run ………….. Jennifer.             A. quickly                  B. more quickly        C. quickly than         D. more quickly than 30. You should study ………….. for the final exam.             A. less hard               B. more hard             C. harder                    D. All are correct ai chỉ giúp em vs ạ