A卷答案：
    一、ABBAB;DCBCA;DCDAA;ADCDA;BBCAC;
    二、BCD;ABC;AC;ABD;BCD;ABC;AD;BCD;ABCD;ABC;ABCD;ABCD;ABCD;CD;ABCD;
    ABD;ABCD;BCD;ABCD;ABD;ABCD;ABCD;ABD;ABCD;CD;
    三、對錯對對錯;對對對對對;錯錯錯對錯;對錯錯對錯;對對對錯錯;對錯錯對對;
    四、DCAAB;CBDCD;
    五、D;AC;D;AD;ABD;A;ABC;AC;ABCD;ABD;AC;B;DB;ABCD;ABCD;
    六、對錯錯錯對;錯對錯錯對;錯對對對錯;錯對錯對對