61. long before 很早以前
62. beg your pardon请原谅。
63. beg sb to do sth请求某人做某事
64. begin with 首先
65. begin/start doing sth. 开始做
66. at the beginning of …的起初
67. believe in . 信仰
68. belong to (介词) 属于
69. do one's best 尽最大努力
70. all the best 一切顺利
71. make the best of尽量利用;善用
72. had better do sth.最好做某事
73. better off 小康
74. a bit of 有点儿
75. be to blame应受谴责
76. blame sb for sth.责备某人某事
77. borrow sth from sb.向某人借某物
78. both…and …两者都…
79. at the bottom of 在…底部
80. break down 出毛病， 抛锚