[求助]that引导的限制性定语从句。。

horoscope

 Lacking information about energy use, people tend to overestimate the amount of energy used
by equipment, such as lights, that are visible and must be turned on and off and underestimate that
  
used by unobtrusive equipment, such as water heaters.
(A) equipment, such as lights, that are visible and must be turned on and off and underestimate
that
(B) equipment, such as lights, that are visible and must be turned on and off and underestimate
it when
(C) equipment, such as lights, that is visible and must be turned on and off and underestimate it
when
(D) visible equipment, such as lights, that must be turned on and off and underestimate that
(E) visible equipment, such as lights, that must be turned on and off and underestimate it when

答案为D。它的解释是 ：
that 引导的应是限制性定语从句,必须紧紧跟在所修饰名词，前面没有名词和介词以及逗号。所以ABC错。

求问~D和E中的第一个that不也是修饰lights且前面有逗号的么？这D和E的不也是错的么？

希望大牛以及各位路人指点~谢谢

[此贴子已经被作者于2009-4-29 16:52:45编辑过]

horoscope

顶贴~~~求救啊~~

uustar

不知道lz这个是哪里的解释。that引导限制性定语从句修饰equipment，A和B用are，主谓不一致，错误。c中that is visible繁冗，可以直接用visible形容词，这个gmat规则里有提到过。c和e后面it指代错误应该是that代替前面同类名词the amount of energy。when也用错了，应该是that和前面平行。