We are deeply impressed that he still concentrates on his study though he is blind．

本题中含有一个让步状语从句，用though来连接，让步状语可翻译成though he is blind，对某事留下印象可用be impressed that+从句的结构来表示，修饰动词印象可用副词深刻地deeply，表示专心于某事物可用concentrate on sth，故本题的主语是可翻译成We are deeply impressed that he still concentrates on his study，所以本题可翻译成We are deeply impressed that he still concentrates on his study though he is blind。