the question was not very difficult,but he _____ couldn't answer it.用but 还是yet用still还是yet 写错了
问题描述：
the question was not very difficult,but he _____ couldn't answer it.用but 还是yet
用still还是yet 写错了
答
the question was not very difficult, but he _yet____ couldn't answer it.
yet “依旧,仍然”之意.填 yet 符合句意和语法.