18. The woman who you spoke is an actress.

　 [改]在spoke之后加to。

　 [析]关系代词who在定语从句中作介词的宾语时，介词须后置。如果介词to前置，who得变为whom。

17. Who are the persons who are sitting on the travel bags and which is the bag which belongs to me?

　 [改]将句中第二who和第二个which

　都改为that。

　 [析]当主句是以who或which开头的

　特殊疑问句时，为了避免重复，定语从句要用that引导而不用who (whom)和which引导。

16. Which is known to all, Mount Emei is one of the famous mountains of China.

　 [改]Which改为As。

　 [析]which, as都可作关系代词引导非限制性定语从句，表示整个主句的内容，并在从句中作主语、宾语。这种从句放在主句的后边时，which, as均可引导；放在主句的前边时，一般用as引导。

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。