with which的几个疑问
why=for which,where=in/ at/ on which,when=during/ on/ in/which
那么with which =什么?by which= 什么?
另外,All tests require a potential candidate 【with whom】to compare DNA
【with whom】 其中whom指代candidate,with candidate to compare DNA
之所以用【with whom】是因为candidate,指人.如果指物,那么是用with which是吗?