15. Do you know the reason why do many people like Zhang Yimou’s films?

　 [改]去掉why之后的do。

　 [析]定语从句须用陈述句语序。关系副词why在从句中作原因状语，其先行词是表示原因的reason。

14. John, who greeted me is my teacher, that is deeply respected by all.

　 [改]me之后加逗号；that改为who。

　 [析]第一个who引导的是非限制性定语从句。从句位于句中时，两头须用逗号与主句隔开。第二个who引导的也是一个非限制性定语从句，关系代词在指人时须用who(whom)，在指物时须用which，不能用that。

13. There’s somebody that wants you on the telephone.

　 [改]that改为who或去掉that。

　 [析]先行词是-body，-one构成的复合代词时，关系代词用who (whom)不用that。口语中在It be / there be / here be后面的关系代词可省略。

12. The scientist has made another discovery, that I believe is of great importance.

　 [改]将that改为which。

　 [析]that不能引导非限制性定语从句。

11. He is our English teacher, without his help I couldn’t have made such rapid progress.

　 [改]将his改为whose。

　 [析]犯这类错误的主要原因是没有弄清句子结构。这是一个主从复合句，逗号前面是主句，逗号后面是“介词 + 关系代词”引导的非限制性定语从句。

10. We will do all what we can to help you out.

　 [改]改what为that或将what删除。

　 [析]先行词为指物的不定代词时，定语从句用that来引导，that在从句中作宾语时可省略，而what不能引导定语从句。

9. I am terribly sorry for having broken the MP4 I borrowed it from you the other day.

　 [改]去掉it。

　 [析]定语从句中的关系代词在从句中充当一定的成分，因此从句中不能再出现与关系代词指代相同的代词或名词，以避免重复。例句中it与省略了的关系代词that/which重复，应去掉。

8. There are many books in the library, most of which is in Chinese.

　 [改]将is改为are。

　 [析]关系代词作主语时，定语从句中谓语动词要与先行词在人称和数上保持一致。例句中关系代词which指代的是先行词books，故从句谓语动词应用复数形式。

7. He is such a lazy man as no one wants to work with him.

　 [改]将him删除或将as改为that。

　 [析]犯这类错误的主要原因是把such ... as ...和such ... that ...两个句型混淆了。

6. Is this factory that you have been working in since your graduation?

　 [改]在that前加the one。

　 [析]犯这类错误的原因是把this factory错看作是定语从句的先行词了。解答这类题时，我们不妨先将疑问语序改为陈述语序。this factory是主句的主语，故应添加the one作定语从句的先行词。当然，在factory前加the也可以，那么this是主语，the factory是表语。