— I heard that one of the middle school students died from overwork.

— Yes, ______ news came as ______ great shock.

A．the; /

B．the; a

C．/; a

D．/; /

所以焦化厂对各供煤基地的煤质要经常进行煤岩化学分析综合研究，以便对供煤基地的煤质作出综合合理的评价，知道煤的合理利用和焦化厂的正常生产。