仔细阅读
56. from a building society
57. expanding
58. content
59. selling shares
60. is pleased
61. cheap printers
62. the drums
63. allow more
64. makes printers
65. the tracking
56. from a building society
57. expanding
58. content
59. selling shares
60. is pleased
61. cheap printers
62. the drums
63. allow more
64. makes printers
65. the tracking