你能做出来，你就可以语法考满分了

chad1123

Mark一下！               

RaymondYC

5.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 it present and indicate that there is one

(b)when a condition is present and indicate that there is one

(c)a conditin when itis present and indicate that it is present

(d)wehn a conditin is present and indicate its presence

(e)the presence of a condition when it is there and indicate its presence 我觉得这个答案是平行对称的很好啊！有什么问题呢？E选项的问题是指代不合理，从when从句看it应该指代the presence of a condition，根据指代一致，its也应该指代the presence of a condition，就变成了出现的出现

封林靖

马一下~