Question

      but he still can not understand it.

A．Told many times

B．Having been told many times

C．He has been told many times

D．Though he has been told many times

Answer 1

C

考查句子结构。因为but是一个表示转折关系的并列连词，可知前面应该是一个句子。排除AB。Though不与but连用，排除D。