51. B. ten 52. A. clever 53. A. liked 54. C. always 55. D. brothers 56. A. anything 57. C. sunny 58. D. the other 59. C. turned up 60. A. quickly
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66. beautiful 67. was raining 68. library 69. on 70. thousands 71. opening 72. were 73. surprised 74. heard 75. books 六) 77. Can I stay by myself? 其他的正确