）that和which在指物的情况下一般都可以互换, 但在下列情况下, 一般用that而不用which。
（1）先行词为all, everything, nothing, something, anything, little, much 等不定代词时。
I am sure she has something （that） you can borrow.
（2）先行词被all, every, no, some, any, little, much等修饰时。
I’ve read all the books that are not mine.
（3）先行词被序数词或最高级修饰时。
This is the first book （that） he has read.
（4）先行词被the only, the very, the same, the last修饰时。
This is the very book that belongs to him.
