869

[vaivish]

869. 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 and dig trenches
(B) to lower the underground water level and to dig trenches
(C) to lower the underground water level and digging trenches
(D) that lower the underground water level and that trenches be dug
(E) that lower the underground water level and trench digging


OA is c.

Why OA is not B where we have parellel 'to' 2 times?

[codesnooker]

869. 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 and dig trenches
(B) to lower the underground water level and to dig trenches
(C) to lower the underground water level and digging trenches
(D) that lower the underground water level and that trenches be dug
(E) that lower the underground water level and trench digging


OA is c.

Why OA is not B where we have parellel 'to' 2 times?

You are trying to make parallel wrong verbs. Look again at the original sentence.

The engineering firm has proposed two solutions:-
1. Installing Pumps.
2. Digging trenches.

So, you need to make parallel the verbs install and dig. Another way to look around at this sentence is that installing pumps will cause the lowering of water level, but installing pumps would not cause the digging of trenches.

Hope this helps....

Regards,
Code Snooker

[vaivish]

thanks again......