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もう１問挑戦です。
おそらく、Aは受動態にしてしまったために、動作の主体が不明瞭になっています。それに対し、Bは対比の意味のwhileを挟んで「２倍にする」と「半分にする」ととてもクリアになっていると思います。
The mechanization
doubled the corn yield
while
(省略)cutting costs to half
いかがでしょうか。
> Although some officials noted that using machines for farming in China costs more than traditional hand cultivation, the <<mechanization of farming in the village of Long Bow doubled the corn yield while the previous year’s costs were cut in half.>>
>
> (A) mechanization of farming in the village of Long Bow doubled the corn yield while the previous year’s costs were cut in half
> (B) mechanization of farming in the village of Long Bow doubled the corn yield while cutting costs to half those of the previous year
> (C) mechanization of farming in the village of Long Bow doubled the corn yield as costs were cut to half of the previous year’s
> (D) farming mechanization in the village of Long Bow doubled the corn yield as it cut in half the previous year’s costs
> (E) farming mechanization in the village of Long Bow doubled the corn yield while costs were cut to half that of the previous year
>
> C,Dは、収穫量が倍になった一方でコストが前年の半分になった、という文脈により、asよりもwhileの方が適切なので×
> Eはthat of the previous yearがthoseになるべき×
>
> 以上によりA,Bにまで絞り込めるのですが、Aの切り方がわかりません。なお、正解はBです。
> よろしくお願いします。
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