省略，关系代词what，how，why在从句中只能作状语，所以选择A项。

黑色陷阱：本题容易错选D项。容易犯定势思维的错误，一见到reason就选why。why 在从句中只能作状语。

绿色通道：分析由定语从句构成的句子一定要找对句子主干，并掌握定语从句中关系代词that或which可以省略的情况。另外，选用关系代词的关键在于正确判断它在从句中充当什么成分，that或which在从句中充当主语或宾语成分。

例5The number of people present at the concert was _______ than expected.There were many tickets left.

A.much smaller B.much more

C.much larger D.many more

思路解析：表示数目的多少用large或small，但不能用many或much，故应将B、D两项排除；从There were many tickets left可知，去参加concert的人要比预计的少得多。故只能选择much smaller,much用来修饰比较级加强语气，所以选择A项。

例6（2002年上海卷）Don't use words,expressions,or phrases only to people with specific knowledge.

A.being known B.having been known

C.to be known D.known 

思路解析：本题考查的是过去分词作定语。known放在名词words,expressions,or phrases后面作后置定语，由于words，expressions,or phrases与know存在着逻辑上的被动关系，故选过去分词形式，相当于一个含有被动语态的定语从句which are known only to...，表示"只是专业人员理解的......"。虽然having been known也能表示被动和完成，但这种现在分词的被动完成式不能作定语或宾语补足语；选项being known表示"正被了解"；选项to be known表示"将被了解"，都与题意不符，所以选择D项。

黑色陷阱：本题容易错选B。having been known也能表示被动和完成，而且ing分词可作定语，容易错选。

绿色通道：现在分词的被动完成式不能作定语或宾语补足语。分词的用法是比较复杂的，要在句子及语境中理解、归纳总结其使用规律。

　　志鸿原创题

　　这是一篇关于影视演员刘亦菲的文章，请仔细阅读后按照要求完成题目。

　　A Bright New Star

　　"She was born for the camera," said a photographer who shot Liu Yifei's picture when she was only eight.

　　Over the past year,Liu,an 18-year-old Chinese American,has shot to fame while playing Wang Yuyan,in Jin Yong's "Eightfold Path of the Heavenly Dragon" (《天龙八部》).Millions of teenagers have been drawn in by her light smile and beautiful long hair.Many magazines have described her as one of the most charming(有魅力的) young actresses of 2004.People say that Liu will be even bigger this year."She is so beautiful on TV.She has the special character to give flesh and blood to the fairy-like and beautiful Wang Yuyan," said Yang Mingwei,a Senior 2 boy and Liu fan from Wuyi High School in Fujian.Currently Liu is filming the TV series "The Return of the Condor Heroes" (《神雕侠侣》),another Jin Yong novel.In the show to be aired this year,Liu plays the Little Dragon Girl.

Liu is currently a grade three student at the Beijing Film Academy(北京电影学院),the star