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 （答案）
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 作者: jy4780163 时间: 2011-3-22 14:40
首先平行结构的话~and后面要带whether D E 错了 A 选项一般我看见having就直接删掉了~这种没有意义~ C选项 的逗号之间的句子 比B 简洁~而且whether和if 这种在一起的话总感觉不清楚表达。。作者: 呼啸700 时间: 2011-3-22 17:14
我纠葛的地方在于 C选项的left 到底是 非谓语 还是 谓语成分 NN帮我分析一下