例句 A mordern city has been set up in ___was waste land ten years ago A what B which C that Dwhere正确答案是A我的疑惑是 这应该是个定语从句吧?但为什么用what 引导?老师说what相当于the place that.但what不是不能当引导词吗?PS 在空格处填the one对不对?