单词拼写（共5小题；每小题1分，满分5分）

小题1:The Song Dynasty c______________ three great inventions to world civilization, which have improved people’s life a lot.

小题2:A kind of friendly ____________ (气氛) can be felt throughout the conversation.

小题3:You have been ______________ (推荐) as a typist in our company.

小题4:He lit a c_________________, got up and went off.

小题5: Doing sports r___________ will help you keep healthy.

医生的首问负责制是什么？