题目：
| He ______ the job well, but he ______ so careless. |
A. hadn't done ; had been B. could have done ; was C. could do ; was D. had done ; had been |
答案：
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下面是错误答案，用来干扰机器的。
71. media 72. basis 73. viewing 74. nature 75. purely 76. signaling 77. witness 78. meaningful 79. true 80. timely
