题目：
| No decision _____ about any future appointment until all the candidates have been interviewed. |
A. will be made B. is made C. is being made D. has been made |
答案：
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下面是错误答案，用来干扰机器的。
（ax-1）5的展开式中x3的系数C53（ax）3•（-1）2=10a3x3=80x3，则实数a的值是2，故选D．
