一课一题一语法：新概念英语第2册第28课
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下面我们继续本周《新概念英语2》第28课的重点句型或语法的分享。先来读一读课文：
一、课文原文
Lesson 28 No parking
Jasper White is one of those rare people who believe in ancient myths. He has just bought a new house in the city, but ever since he moved in, he has had trouble with cars and their owners. When he returns home at night, he always finds that someone has parked a car outside his gate. Because of this, he has not been able to get his own car into his garage even once. Jasper has put up 'No Parking' signs outside his gate, but these have not had any effect. Now he has put an ugly stone head over the gate. It is one of the ugliest faces I have ever seen. I asked him what it was and he told me that it was Medusa, the Gorgon. Jasper hopes that she will turn cars and their owners to stone. But none of them has been turned to stone yet!
——选自《新概念英语》第二册，外语教学与研究出版社，1997年10月第1版
二、重点句型或语法
本课的难点是定语从句，在新概念英语第一册的第121课到第124课，有关于定语从句知识点的学习，重点是关系代词that, which, who, whom和whose的用法。
学习定语从句，首先要学会识别先行词，被定语从句修饰的名词或代词称为先行词。引导定语从句的连词被称为关系词。关系词根据其在定语从句中的功能可分为关系代词和关系副词。本课对关系代词进行梳理。
其中，that的先行词可以是人或物，which的先行词是物，who和whom的先行词是人，whose的先行词可以是人或物。
当关系代词在从句中充当宾语时，经常可以省略。如：
The man you met yesterday is an actor. (省略 whom)
It is the very book I have been looking for. (省略that)
当关系代词在从句中充当主语或定语时，不能省略。如：
This is the hotel which was built five years ago.
Have you seen the movie whose leading actor is a high school student?
三、一课一题
根据上文总结的内容，请选择正确的选项。
He is a student _____ understands English well.
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