（一）基础：引导词---who, which, that, whom,
1.I like cities___________are quiet and clean.
2.I prefer students _________are hard- working.
3.I hate TV shows _________ are noisy and boring.
4.The music __________ is gentle and quiet attracts me a lot.
5.The food __________tastes delicious is not always healthy.
6.Those boys ___________ are playing basketballs over there are from Class Fifteen.
7.The books ____________ are written by Lu Xun are worth reading.
8.The town ___we visited last week is much larger than before.9.The book ___ he bought is very interesting.
（二）特例：只用that的情况
1先行词被___________或___________所修饰，或本身是______________________时，只能用 that，
2.被修饰的先行词为 ________________________________________________等不定代词时, 只能用 that.
3.先行词被 _____________________________________________等词修饰时，只能用 that，而不用 which。
4.先行词里同时含有______________________，如I can remember well the persons and some pictures that I saw in the room.
5. 以______________________引导的特殊疑问句，只能用that.如： Who is the girl that is crying?
6. He was the first person _______passed the exam.
7.He talked happily about the men and books________interested him greatly.
