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标题: GWD2-Q34 [打印本页]

作者: xyredpoppy 时间: 2009-9-7 23:25
标题: GWD2-Q34

GWD2-Q34:

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.

and whether, presuming such life forms having left fossil traces to begin with, those traces can
and whether, if it is presumed that such life forms left some fossil traces to begin with, can those traces
and whether, presuming such life forms left fossil traces to begin with, those traces
and, presuming such life forms did leave some fossil traces to begin with, if they can
and, presuming such life forms to have left fossil traces to begin with, if they

Answer: A

时态完全搞不清除了，为什么A用 having left fossil traces ？

作者: ljc0729 时间: 2009-9-8 00:46
个人偏向C，觉得A的HAVING LEFT 有问题

作者: xyredpoppy 时间: 2009-9-8 21:20

大家来看一下？难道我答案错了？

作者: dreamroad 时间: 2009-12-1 22:44
答案是C

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