OG蓝皮书SC-Q80

mingminglouer

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 indicated 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


正确答案--C  我选择了B
这道题非常的让我困惑，，，首先OG说A项中的there is one让it没有指代，这怎么说阿？还有题目中detect后面加a condition when或者when a condition有什么影响呢？还说C项比较平行，但我确实看不出来阿，，，，，困惑，非常之困惑，，，，这道题该怎么判断啊？

suners

and indicate that后应该怎么写，实际上是要根据题目中给的提示，也就是when it is not。它规定了要用it be这种结构，而不是什么there be。这就是OG所谓的如果there be了，那么最后的it指代谁去？？ detect是及物动词吧，后面要跟一个宾语--detect a condition。
比较平行，我的理解是--will fail XXXX and (will) indicate。那些it全是说的condition。

mudiduanger

detect 后面应该叫宾语的，when不能引导宾语从句，所以要有个宾语，排除BD
E awkward

A one不对，选C

trtwarrior

这题很复杂的说考点很多～
a condition when it is present and indicate that there is one when it is not
1 detect 是及物动词 后面必须有宾语的
2 it 指代 condition
3 and 与 detect 并列
4 that 在标准书面语中 比喻从句的that 不能省略
5 做题时注意未划线的部分 when it is not 省略了表语形容词，因为要前面的名词的话就要用that 或one什么的指代了 所以必须是present
由 第五点就看出来是C啦

mingminglouer

谢谢几位的精彩回答！！！我明白了！！！～

suners

回复 5# mingminglouer


    谨代表楼上几位说声，不客气。