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. |