NASA’s methodical approach to the exploration of Mars has not yet answered the questions of whether biological life forms ever emerged on Mars and whether, presuming such life forms having left fossil traces to begin with, those traces can still exist in some moist recesses of the cold and arid planet.
A. and whether, presuming such life forms having left fossil traces to begin with, those traces can
B. and whether, if it is presumed that such life forms left some fossil traces to begin with, can those traces
C. and whether, presuming such life forms left fossil traces to begin with, those traces
D. and, presuming such life forms did leave some fossil traces to begin with, if they can
E. and, presuming such life forms to have left fossil traces to begin with, if they
答案为A，我选了C
疑惑：
白勇的语法全解上说现在完成时形式的分词不能做定语修饰名词，可是A中 having left 。。。不就是修饰life forms了吗
我觉得这里的having left不是做的定语
你想想定语是修饰成分，也就是去掉之后句子依然完整，但是你把A中的having去掉后， presuming such life forms. 已经不是一个完整的句子了，个人觉着这里是做补语
其实也就相当于presuming that such life forms have left some fossil trace ... 应该可以看出来不是修饰关系
郁闷阿，这个题究竟选什么？哪位大牛冒个泡？
新东方的讲解网站上居然说选B,理由如下：
“划线部分第一个词是and, 这决定了前后必须对称，由于划线部分前面是whether，所以D和E后面的if都错了。A和C有个非常严重的错误，presuming这个分词是没有动作的发出者的，逻辑发生错误。”
我只知道DE一定错...到底选什么？
选A
and whether（, presuming such life forms having left fossil traces to begin with, ）those traces
can
whether those traces can...；presuming的主语是隐含的
B里边“if it is presumed that”太啰嗦了；whether can those traces 也不成立
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