We should________the lights when we leave our classroom because we must

save electricity.                   [ ]

A. switch on  

B. switch over  

C. switch off  

D. switch through

鲁迅先生评价《三国演义》时曾说：“欲显刘备之长厚而似伪，状诸葛之多智而近妖”，试结合作品进行分析。