帮忙做几个英语句子(定语从句)

帮忙做几个英语句子(定语从句)
Join the pairs of sentences with who,whom,which or that.
Model:The woman is my mother.you are looking after her.
The woman who you are looking after is my mother.
1Here is the pen.You lost the pen the day before yesterday.
2 A fridge is a machine.This machine is used for keeping food fresh.
3 The students will not pass the exam.They do not work hard.
4 The train was late.The train was going to Wu Han.
5 Can you help me find the person?The person saved the girl yesterday morning.

1.Here is the pen taht you lost the day before yesterday.
2.A fridge is a machine,which/that is used for keeping food fresh.
3.The students whom do not work hard will not pass the exam.
4.The train that/which was going to Wu Han was late.
5.Can you help me to find the person who saved the girl yesterday morning?
which 和that 基本上都是差不多的,所以可以都用.who 和whom 的区别很难判断,但在3和5里面的作用和意思是有一点区别的.

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