In order to show his boss what a careful worker he was , he took _____ trouble over the figures.A extensive B spare C extra D supreme问题补充：麻烦帮我解释一下选择的理由，谢谢！
热心网友
选择C.extra 固定搭配take extra trouble=take extremely great efforts
热心网友
选择c， 意思是他为了取悦他的老板，他发了额外的时间来打扮自己的形象。