怎么看也不平行啊

qianmenghe

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.

 

1. and whether, presuming such life forms having left fossil traces to begin with, those traces can

2. and whether, if it is presumed that such life forms left some fossil traces to begin with, can those traces
3. and whether, presuming such life forms left fossil traces to begin with, those traces

4. and, presuming such life forms did leave some fossil traces to begin with, if they can
5. and, presuming such life forms to have left fossil traces to begin with, if they

这题A对称吗?????EMERGED 和HAVING LEFT 平行??????

neo1001

为什么要emerged和having left来对称？

真正对称的是，whether ... emerged 和 whether... can still exist来的对阵

至于那个presuming...having left...只不过是后一个whether从句里的一个状语而已

qianmenghe

啊,明白了,谢谢哦~哈哈