请教OG—SC—128

joywzy

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

答案：E，我选D，D什么地方不好呢？

谢谢！

gladys

选项D引起了歧义： （注意由'and'并列的对象 ）

因为D中， irrigation 可以和 fertilizer 或 application 并列

而选项E
irrigation 仅与 application 并列。

[此贴子已经被作者于2003-3-15 13:34:10编辑过]