Q6 :TT-GWD 2-34. 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
答案选C 有些人说是A
但是本人觉得应该选B, 原因如下: 1)whether and ..whether 并列,排除D, E
2)A和C的presuming都没有逻辑主语, those traces不能作为presume的逻辑主语
3) presume that....或presume sth. to be done....,A和C中 presume 后面显然跟的是从句,而不是分词
B的缺点在于can those traces....; 但好像不是严格的错误??
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