29. It is so good a book _____ we all like to read.

A. that　　 B. what　　 C. as　　　 D. it

答：C。此属中as为关系代词指先行词book，做从句中read的宾语。若选A项构成so...that... (such...that...)句式，为结果状语。在结果状语从句中that不充当句子成分。试比较：

It is so good a book that we all like to read it.

It is so good a book as we all like to read.

28. _________ is known to all, China will be an and powerful country in 20 or 30 years’ time.

A. That, advancing　　　　 B. This, advanced

C. As, advanced　　　　 　　D. It, advancing

答：C．as引导的是定语从句。注意as引导的定浯从句与which引导的定语从句的比较：

① He is good at maths, as we all know. as 指前边整个句子的内容，在从句中做know的宾语。

② He is good at maths, as is known to all. as 还是指前边整个句子的含义，做从句中的主语。

③ He is good at maths, which makes his mother proud, which 也指前边句子的含义，做从句中的主语。

④ He is good at maths, which I personally doubt, for he never studies hard. which仍指 He is good at maths 这件事，傲从句中的宾语。

由此可以看出：as和which都可以引导非限制性的定语从句，都可以做从句的主语，也都可以傲从句的宾语。但其区别在于：①as傲从句的主语时，常用被动语态，which做从句的主语时，常用主动语态。②as引导的非限制性定语从句可放在句首，而which引导的非限制性定语从句不能放在句首，如 As we all know, he is good at maths。另外，注意as引导的非限制性定语从句与主语从句的区别：

It is known to all that he is good at maths. (1t为形式主语，真正主语为that从句。)

As is known to all, he is good at maths.

27. I don’t llke_______ you speak to her.

A. the way　　　　　 B. the way in that

C. the way which　　　 D. they way of which

答：A．当way傲先行词的时候，关系代词可用in which或that代替inwhich，或省略that。

26. After living in Paris for fifty years, he returned to the small town ____ he grew up as a child.

A. which　　 B. where　 C. that 　　D. when

答：B．where在从句中做状语。

25. He paid the boy $10 for washing ten windows, most of ________ hadn’t been cleaned for at least a year.

A. these　 B. those　　 C. that　　 D. which

答：D．为非限制性的定语从句，又为介词放在关系代词前的用法。

24. All ______ is needed is a supply of oil.

A. which　 　　　B. what　　

C. whatever　 　　D. that

答：D．先行词是不定代词，关系代词用that。

23. When you read the book, you’d better make a mark ___________you have any ques-tions.

A. at which　　　　 　　B. at where

C. the place where　　 　D. where

答：D。where引导的是状语从句，因mark(标记)不是指地点，不是先行词，若选C项，在theplace前应有介词at。

22. Such a film _______ was shown in the cinema yesterday is not popalar with chil-dren.

A. that　　 B. which　　 C. as　　 D. what

答：C。as引导的是定语从句。

21. Everything_______can be done has been done.

A. which　 　B. that　　 C. what　　　 D. it

答：B。先行词为不定代词，关系代词用that，不用which．

20. The first English novel_______I read was Robinson Crusoe.

A. which 　　　　B. that　　　　　

C. where　　　　 D. who

答：B。当先行词被序数词，形容词的最高级或the only，the very，the last等词修饰时，关系代词用that，不用which。