对什么自信的英文

be proud of

【对...充满自信】have faith in..【集中精力投入考试】focus your attention on the test 祝你学习进步，更上一层楼！ 不明白及时追问，满意敬请采纳，O(∩_∩)O谢谢~~

be confident about 如：But there is scope to lower this ratio if management feels increasingly confident about the outlook.而如果管理层对前景感到越来越有信心的话，这一比率还有下调的空间 祝你学习进步，更上一层楼！ (*^__^*)不明白的再问哟，请及时采纳，多谢 !

口语：am/is/are absolutely sure about......写：am/is/are fully confident of ......集中精力投入考试：to pay full attention to the examto focus on the exam