The boy the teachers considered ______was caught _____ in the exam, which surprised us very much. [ ]

A. to be the best; cheating

B. as the best student; to cheat

C. to have been studied well; cheating

D. as a good student; to cheat

中学化学中很多“规律”都有其适用范围，下列根据有关“规律”推出的结论合理的是（）

A．根据同周期元素的第一电离能变化趋势，推出Al的第一电离能比Mg大　　

B．根据主族元素最高正化合价与族序数的关系，推出卤族元素最高正价都是+7　　

C．根据价电子构型与化合价的关系，推出最外层电子数3个的元素一定是第ⅢA族元素　

D．根据较强酸可以制取较弱酸的规律，推出CO₂通入NaClO溶液中能生成HClO