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题库 / OG2019-SC-709
Over the past ten years cultivated sunflowers have become a major commercial crop,second only to soybeans as a source of vegetable oil.
second only to soybeans as a source of vegetable oil
second in importance to soybeans only as a source of vegetable oil
being second in importance only to soybeans as a source of vegetable oil
which,as a source of vegetable oil, is only second to soybeans
as a source of vegetable oil only second to soybeans
题目分析：过去的十年，向日葵已经成为一种主要的商业作物，作为植物油来源之一地位仅次于大豆。
涉及到知识点：only的用法：only紧紧修饰其身后的词。
选项分析：
A选项：正确。only修饰大豆，意为“（向日葵）次于的，仅仅是大豆，没有别的作物”。
B选项：only修饰as a source。意为“仅仅作为植物油”，但理论上应该是“仅仅超过大豆”。
C选项：这里second前加了“being”，表示“正在是排第二的”，但从时态角度来说，没必要用正在进行时。
D选项：which引导的定语从句，谓语动词为is，修饰了crop，但理论上应该修饰sunflowers。
E选项：only修饰second，意为“仅仅是次于的，没有别的特征”，但理论上应该是“次于的，仅仅是大豆，没有别的作物”。
X is second only to Y = only Y can be better than X out of all the options available
X is only second to Y = X is second to Y, but may be first, third, or tenth compared to other options available
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