Simply because they are genetically engineered does not make it any more likely for plants to become an invasive or persistent weed, according to a decade-long study published in the journal Nature.
(A) because they are genetically engineered does not make it any more likely for plants to
(B) because it is genetically engineered does not make a plant any more likely to
(C) being genetically engineered does not make it any more likely that plants will
(D) being genetically engineered does not make a plant any more likely to
(E) being genetically engineered does not make a plant any more likely that it will become
答案C 请问里面it指代什么？
另外，我见到being就秒了。请问being什么时候是对的？ | 
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发表于 2011-7-3 02:54:22
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