and的作用

outsider0214

The caterpillar of the geometrid moth strikes when special tactile hairs on its body are disturbed, after capturing its prey, holds the victim so that it cannot escape.                                    

• A strikes when special tactile hairs on its body are disturbed,
• Bstriking when special tactile hairs on its body are disturbed, but
• Cwhich strikes when special tactile hairs on its body are disturbed,
• Dwhich,striking when special tactile hairs on its body are disturbed,
• Estrikes when special tactile hairs on its body are disturbed and,
  

每次我的选项都和正确答案之间一步之遥，请问，E的and在这里有什么作用？必要的？

wyx85

这个句子的主干是The caterpillar strikes and holds。两个谓语动词，需要连接词。根据logical prediction，这里的连接词是and，不能是but。
把不要的部分砍去，看句子主干，会比较明晰。

outsider0214

wyx85 发表于 2013-10-15 00:38
这个句子的主干是The caterpillar strikes and holds。两个谓语动词，需要连接词。根据logical prediction ...

中间的插入语，很恼人~~~~