<求助>大全804（OG 12 VERBAL 105) 关于形容词+to do/to be done 用法

1.   The physical structure of thehuman eye enables it to sense light of wavelengths up to 0.0005 millimeters; infraredradiation, however, is invisible because its wavelength—0.1 millimeters—is toolong to be registered by the eye.
(A) infraredradiation, however, is invisible because its wavelength—0.1 millimeters—is toolong to be registered by the eye
(B) however, thewavelength of infrared radiation—0.1 millimeters—is too long to be registeredby the eye making it invisible
(C) infraredradiation, however, is invisible because its wavelength—0.1 millimeters—is toolong for the eye to register it
(D) however,because the wavelength of infrared radiation is 0.1 millimeters, it is too longfor the eye to register and thus invisible（A）
(E) however,infrared radiation has a wavelength of 0.1 millimeters that is too long for theeye to register, thus making it invisible


答案A
这个题讨论的焦点问题是A和C ，即register的宾语是 infrared radiation还是 its wavelength。既然OG认为register的宾语是its wavelength，而且OG解释说C中的it lack a clear referent.我们先姑且不管这个问题。
我的问题是
1. X be too adj to do 的结构中， to do 这个动作的发出者一定是X吗？似乎不是
牛津高阶有个不同但是类似的例句 It's too long a journey to make in one day. 这里to make 实际上是 被动吧，因为是 people make the journey.是否由此可以推测出 A中 to be registered可以换成 to register？
 
2.C的结构。too...for someone to do: The table was too heavy for one person to carry
在这个结构中，就是主动表示被动。to carry 的对象就是主语 the table,后面不用加it。所以我觉得C的问题不是it指代不清，而且根本就不能再接一个名词，除非有这样一个结构： x is too adj for y to do z.

我同意你的观点哦~~我来举个简单的例子吧

This book is too abstract to read.                    (Who will read the book? Unknown people. )
This book is too abstract for a novice to read.
This book is too abstract to be read by a novice.
以上句子正确。
这个句子不能写成：
This book is too abstract for a novice to read it.