旧恨未消，又添新愁　ＯＧ１２８

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.

(A)  requirements of irrigation and application of commercial fertilizer by earlier high-yielding varieties

(B)   requirements by earlier high-yielding varieties of application of commercial fertilizer and irrigation

(C)  requirements for application of commercial fertilizer and irrigation of earlier high-yielding varieties

(D)  application of commercial fertilizer and irriga­tion that was required by earlier high-yielding varieties （Ｅ）

(E)   irrigation and application of commercial fertil­izer that were required by earlier high-yielding varieties

好不容易把一切都弄明白，又被新愁困扰．

为何句子前后时态不一致？在我看来前后应该都用现在时才对．这好象是个科学成果．

这才发现一直以来我的理解是错的！

earlier high-yielding varieties指的是以前高产量的品种，可我理解成了在早期就能高产的品种．但仔细品味了一下，确实是前一种理解正确，因为和New hardy varieties平行．

哎！ＳＣ真是字字珠肌，让人欲罢不能．

同感！MM加油了。