()many times,but he still could not understand it.A:Having been told B:He had been told 为什么选B不选A,
问题描述:
()many times,but he still could not understand it.
A:Having been told B:He had been told 为什么选B不选A,
答
选A的话,“but”前的句子缺少主语成分.but是连词,连接两个并列的句子,要求两个句子的成分都要完整.如果去掉but就可以选A了.