OG83

carriehsin

83.Any medical test will sometimes fail to detect a condition when it is present and indicate that there is one when it is not.
(A) a condition when it is present and indicate that there is one
(B) when a condition is present and indicate that there is one
(C) a condition when it is present and indicate that it is present
(D) when a condition is present and indicate its presence
(E) the presence of a condition when it is there and indicate its presenc
answer:C
請問~
我的問題是D的its presence
OG的解釋是...D,E中的its presence leaves the it in when it is not without a logical reference.
可是its presense不是指conditon's presense嗎?
所以it就自然是指condition拉... 不過OG卻說他沒有reference??
不懂ㄟ 請大家幫幫忙~~
另外對於代名詞的問題實在很惱人...
代名詞it在一個句子當中是否一定要指代同一個東西呢??
像第60題的its 和it 卻又是指代不同東西?
實在很confused..
拜託大家了!!
謝謝!!

rosmarine

尽管从逻辑意思上谁都能看出D里的it指的是condition，从语法上来说Any medical test will sometimes fail to detect (when a condition is present and indicate its presence) when it is not.句子倒数第三个字it可以指代condition，也可以指代presence，所以说D指代不清，只有C里所有的it都准确无误的指condition。

另外，D还有一个问题，句子结构简化成这样子：medical test will fail to detect...and indicate ...这里detect的宾语是什么？D没有交代出来，只交待了一个时间when a condition is present。  

maydaythekid

以下是引用rosmarine在2006-4-26 14:41:00的发言：
尽管从逻辑意思上谁都能看出D里的it指的是condition，从语法上来说Any medical test will sometimes fail to detect (when a condition is present and indicate its presence) when it is not.句子倒数第三个字it可以指代condition，也可以指代presence，所以说D指代不清，只有C里所有的it都准确无误的指condition。

另外，D还有一个问题，句子结构简化成这样子：medical test will fail to detect...and indicate ...这里detect的宾语是什么？D没有交代出来，只交待了一个时间when a condition is present。  

强，很清晰

1.最后一个it的指代

2. detect动作的对象（即 any medical test will sometimes fail to detect 的宾语）