There-is-a-one-for-sure,you-should-have-a-eye-to-find-him!该如
2个回答

意思大概是:这里毫无疑问有一个(人),你应该程亮你的眼睛(好好利用你的眼睛)来找他!

(我想,说话者应该是用责备的语气,怪受训者之前没有好好找,所以才说“你应该有(用)只眼睛来找他”,不过,具体也要根据语境而定)

回答嘛可以说:Ok,I see.好的,我知道了.

或说:sorry,I will find him more carefully.对不起,我将会更用心(更仔细)地找他!