which是关系代词,引导定语从句,指物,在定从中作主语或宾语,其先行词是指事物的名词或者是代词.做宾语时在非正式文体可以省略.如:Yesterday Emily was wearing the new dress (which) I gave her.I found some photos of interesting places which were not too far away from Chengdu.
which是关系代词