新东方版 Section A 26. [E] challenges 27. [J] searched 28. [D] categorizing 29. [K] similarities 30. [L] slightly 31. [G] percentage 32. [O] traditional 33. [I] regardless 34. [H] proving 35. [M] suggests Section B 36. [I] 37. [D] 38. [J] 39. [F] 40. [B] 41. [H] 42. [C] 43. [K] 44. [G] 45. [E] Section C passage one 46. [B] He intends to get rid of the tipping practice. 47. [C] It forces the customer to comensate the waiter. 48. [D] They can have some say in how much their servers earn. 49. [A] Services quality has little effect on tip size. 50. [D] Waiters should be paid by employers instead of customers. passage two 51. [C] The impact of cheap oil on global economic growth. 52. [D] Consumers will spend their savings from cheap oil on other commodities. 53. [C] They use their money reserves to back up consumption. 54. [B] Its negative effects more than cancel out its positive effects. 55. [A] People are not spending all the money they save on gas.