Unlike crested wheatgrass, an alien species from Siberia that forms only shallow roots and produces tall above-ground shoots, native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very tall.
(A) native North American grasses develop an extensive root system, allowing for greater enrichment of the soil, but do not grow to be very
(B) native North American grasses develop an extensive root system, which allows for their greater enrichment of the soil, but without growing to be that
(C) the root system of native North American grasses is extensive, allowing for greater enrichment of the soil, but they do not grow to be very
(D) the root system of native North American grasses is more extensive, allowing for the greater enrichment of the soil, but these grasses do not grow to be very
(E) the extensiveness of the root system of native North American grasses allows for their greater enrichment of the soil, but they do not grow to be that
A 中的but后直接加谓语动词感觉很奇怪啊,那倒是省略了???作者: linmeimei 时间: 2010-9-11 07:50
A) native North American grasses develop an extensive root system, allowing for
greater enrichment of the soil, but do not grow to be very
grasses develop ```` but (grasses) do not grow``
怎么会奇怪呢作者: bloomers 时间: 2010-9-11 21:01
thx
再问 but后面的省略有几种情况啊,除了同主句主语一致,还有其他的吗?
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