问题
选择题
His English, ______ used to be very poor is now excellent.
A．which
B．that
C．it
D．whom
答案
答案：A
题目分析:考查定语从句。分析结构可知此处是非限制性定语从句，故排除C、D选项，因为that不引导非限制性定语从句。先行词是English，所以用指代物的关系代词which。正确答案是A。句意：他的英语以前很差，现在却非常棒。