只可用that.
下列情況只可用“that”而不可用“which”：
1.序數(shù)詞或最高級(jí)形容詞或敘述此修飾先行詞,如first,best
2.先行詞是all,little,much,few,anything,
nothing,something,none,the one時(shí)
3.先行詞被any,few,little,all,no 修飾時(shí)
4.先行詞被the only,the very,the same,
the last修飾時(shí)
5.先行詞既有人又有物時(shí).
6.當(dāng)句中已有who時(shí),為避免重復(fù).
高中階段知道這些就可以了.