请教1000 sc #95

billxxyy

1.     Although some officials noted that usingmachines for farming in China costs more than traditional hand cultivation, themechanization of farming in the village of Long Bow doubled the corn yieldwhile the previous year’s costs were cut in half.
(A) mechanization of farming in thevillage of Long Bow doubled the corn yield while the previous year’s costs werecut in half
(B) mechanization of farming in thevillage of Long Bow doubled the corn yield while cutting costs to half those ofthe previous year
(C) mechanization of farming in thevillage of Long Bow doubled the corn yield as cost were cut to half of theprevious year’s
(D) farming mechanization in thevillage of Long Bow doubled the corn yield as it cut in half the previous year’scosts（B）
(E) farming mechanization in thevillage of Long Bow doubled the corn yield while costs were cut to half that ofthe previous year
answer是B，可是cutting costs的主语是谁呢？这里难道是mechanization of farming吗？不是太理解。while是肯定的，可以排除cd，a因为while后面的从句问题也是可以排除的，但是b中cutting的主语我一直不了解。所以我选的时候选的是e。觉得farming mechanization也是可以的吧。

michaelmay17

mechanization of farming 是cutting的主语

gastank

costs 是复數，要用those instead of "that". in addition, 二楼
的主语解释is right.