the man under the tree is Mr Li对under the tree提问,为什么用which,不用who,where
问题描述：
the man under the tree is Mr Li对under the tree提问,为什么用which,不用who,where
答
under the tree 是介词短语作后置定语,修饰前面的the man,所以应该问的哪一个,所以用which