【问】 一九八三年攻读硕士学位研究生考试英语试题第1.4题：

I am sure that____you said is wrong.

A. which B. all C. this D. what

标准答案规定选D，我认为亦可选B。

【答】 选B并不比选D逊色，请看下面的例句：

1. All you say may be quite true. (《英汉四用辞典，P. 71》)

2. All I want is a room somewhere. (Practical English Usage，P. 38)

3. All he need do is state his opinion clearly. (Jacobson)

4. All you need do is to take a taxi from the airport. (LEG)

5. All____is a continuous supply of fuel oil.

A. what is needed B. that is needed

C. the thing needed____D. for their needs(TOEFL，77. 5; 78. 4)

在上面的用法中，all之后省略了充当宾语的关系代词that(即使用了零关系代词)。充当主语的关系代词that则不能省略。(参见all that/what)