几个有关定语从句的英语问题

Question

我老师叫我们寒假自学，有些问题自己不能解决。特此请教。把我的错误指出来，能讲为什么更好。还能告诉我什么时候用who or that or which 吗？

以下20题用who,that,which填空。（后的括号为我的答案）

1.A plane is a machine____ can fly.（that）
2.The man ____ is reading the newspaper is my father.(who)
3.That is the detective ___ found my necklace.(who)
4.This is the only book__ was given to me by my brother for my birthday.(which)
5.Polly was the thief___ stole Mum's necklace.(who)
6.The park __ we are going to is beautiful.(which)
7.The picture __ we took in Beijing are good.( that)
8.He is the most careful boy __ I have known.(who)
9.The boy __ weplayed football with is call Lilei.(who)
10.this is the film __ I have seen before (which)

11.The house __ we live in is very old.(which)
12.Those are the shoes __ I lost last week.(that)
13.That is the man __ found my bag.(who)
14.Lucy can't eat food __ has chocolate in it .(that)
15.The car ___ my uncle bougut last month is very beautiful.(which)
16.the village __ GuoPeng lives in is very far away.(which)
17.The boy __ is wearing the black jacket is vere celver.(who)
18.I hate people __ talk much but do little .(who)
19.The detective found the thieves__ robbed the bank.(who)
20.My aunt works ina university __ has over 5,000 students.(which)
还有一句(填空)

-what does the sign mean ?
-_ sign?
-The one _ _ "EXIT".
-Oh ,it means going out from here.

Answer 1

你的答案都是正确的，who一般用于指人，在从句中作主语或者宾语。which指物，that可以指人也可以指物。通常来说，能用which的定语从句就可以用that，但有两个例外：第一是介词前置的，不用that；第二是非限制性定语从句(特别是前面有逗号的)不用that.
另外，当先行词(被定语从句修饰的词)被only、all等限定死了的形容词修饰，或者被最高级形容词修饰的时候，只用that。所以第8题用that会更好。但由于是指人的，所以who往往在这时候顶替that。