The devastating floods and droughts that imposed a recurrent tax of suffering on the fellahin no longer occur.Egyptian agriculture has been transformed，and industry is benefiting from power generated by the dam.

The devastating floods and droughts that imposed a recurrent tax of suffering on the fellahin no longer occur.Egyptian agriculture has been transformed，and industry is benefiting from power generated by the dam.

A.过去不断给农民带来毁灭性的旱涝两灾，现在不再发生了。埃及的农业得到了转型，工业也用上了水坝发的电。

B.过去不断给农民带来毁灭性的旱涝两灾，现在不再发生了。埃及的农业得到了改造，工业也用上了水坝发的电。

C.过去不断给农民带来毁灭性灾害的不但有旱涝两灾，而且还有税收。但是，埃及的农业得到了改造，工业也用上了水坝发的电。

D.过去不断给农民带来毁灭性灾害的不但有旱涝两灾，而且还有税收。但是，埃及的农业得到了转型，工业也用上了水坝发的电。

正确答案是B