Fistail wrote:
To help preserve ancient Egyptian 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.
(A) to lower the underground water level anddig trenches
(B) to lower the underground water level andto dig trenches
(C) to lower the underground water level and digging trenches
(D) that lower the underground water level and that trenches be
...
.jpg)
