By the same techniques used for genetically enhancing plants, making them disease- or pest-resistant, researchers have been able to increase the amount of protein in potatoes, sweet potatoes, and tobacco.
A. By the same techniques used for genetically enhancing plants, making them
B. With the same techniques to genetically enhance plants, so that they are
C. Employing the same techniques used to genetically enhance plants so that they are
D. Employing the same techniques to genetically enhance plants, which makes them
E. Employing the same techniques for genetically enhancing plants that make them
Ans:C
...............請問是怎麼解呢??\我是選D....
因為我覺得C中的They不知道是代替誰??they是主格 ,不可能代替plants阿?!....所以我選D,原本是想說which整句修飾plants...說明plants...但現在發現them應該也是只plants...不可能....那到底是怎麼解呢??
靠句意嘛??那C的意思是什麼呢??覺得那個so that 怪怪的........
麻煩...請指教!!