白勇的GMAT语法全解上的题

garnet729

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 presence

基本看不懂他的解答。。。。。哪个牛人帮帮我吧，谢谢

garnet729

跟省略句有关

garnet729

没有人帮我解答一下么

Rohto

以下是引用garnet729在2007-8-15 1:19:00的发言：

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 presence

基本看不懂他的解答。。。。。哪个牛人帮帮我吧，谢谢

我的解题思路:

Step1: detect+ noun.宾语--〉排除 B,D

Step2: it ,its指代不明--〉排除E

Step3: 比较难排除-我不觉得一看到there be就一定排除

A and C: According to OG-the phrase indicate that there is one does not grammatically fit with when it is not because it has no referent

这里there is one引起了代词指代混乱，没有C好

janejane1009

这道题OG11上面有解释

ABDE有个同样的错误，就是使得when it is not. 中的it没有正确指代对象

it本应指代a condition

但there is one 和its presence使其无法指代condition

从而同一个代词出现指代对象不同，产生错误