XDF(入学考试指导中)-43-6

iiyaya_sun · 发表于 2006-11-18 19:28:00

To help preserve ancient Egyption monuments threatened by high water tables,a swedish engineering firm has proposed installing pumps,perhaps solar powered,to lower the underground water level and dig trenches around the bases of the stone walls.

C.to lower the underground water level and digging trenches

E.that lower the underground water level and trench digging

句子一开始不是已经表明那个管子的目的了吗，划线部分不正是对 installing pumps的补充说明吗，为什么还要用不定式。

iiyaya_sun · 发表于 2006-11-19 00:03:00

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XDF(入学考试指导中)-43-6

XDF(入学考试指导中)-43-6

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