128. New hardy varieties of rice show promise of pro­ducing high yields without the costly requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties. requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties requirements by earlier high-yielding varieties of application of commercial fertilizer and irrigation requirements for application of commercial fertilizer and irrigation of earlier high-yielding varieties application of commercial fertilizer and irriga­tion that was required by earlier high-yielding varieties irrigation and application of commercial fertil­izer that were required by earlier high-yielding varieties Choice E, the best answer, clearly and grammatically expresses the idea that two costly procedures, irrigation and the applica­tion of... fertilizer, were required by earlier high-yielding varieties of rice. In A, the placement of by earlier... varieties immediately after application of fertilizer suggests that the varieties applied the fertilizer. In B and D, the phrase applica­tion of... fertilizer and irrigation is ambiguous in meaning: it cannot be clearly determined whether applying fertilizer and irrigating are a single operation or two distinct operations. In C, only irrigation--not both irrigation and fertilization--is clearly associated with the earlier... varieties of rice.
D, the phrase applica­tion of... fertilizer and irrigation is ambiguous in meaning: it cannot be clearly determined whether applying fertilizer and irrigating are a single operation or two distinct operations。
这题是考跳跃修饰。可是我觉得D也是修饰明确啊。为什么OG的解释是什么意思？ was 的主语是application，application有两样东西：一是commercial fertilizer ，二是irriga­tion。这就说得蛮清楚的啊？
