大全555，没有人问过

555.One noted economist has made a comparison of the Federal Reserve and an automobile as racing through a tunnel, bouncing first off one wall, then the other; the car may get where it is going, but people may be hurt in the process.

(A) made a comparison of the Federal Reserve and an automobile as racing through a tunnel, bouncing

(B) made a comparison between the Federal Reserve and an automobile racing through a tunnel, bouncing

(C) compared the Federal Reserve with an automobile as racing through a tunnel and which bounced

(D) compared the Federal Reserve to an automobile ？racing through a tunnel, bouncing（D）  

(E) compared the Federal Reserve with an automobile that races through a tunnel and it bounces

我想问问，两个动词是怎么并列的 racing  －－－，bouncing－－－，then  the other.为什么没有and链接词？谢谢

sorry,

I just want to know why there is not a "and" betweeen racing and bouncing?

futhermore,I think"then" is the connector between the one wall and another.

Could you reconsider this question ?

Thanks a lot!

我理解bouncing前之所以没有联接词and，是因为它和racing根本就不是并列关系。bouncing可以看成是分词短语位于句尾表示伴随状况。而racing是现在分词短语做定语，它可以转化为一个定于从句：that is racing through a channel.

You're right.四楼的解释比较确切；bouncing first off one wall, then the other是an automobile as racing through a tunnel的伴随状语。这里as作为连词，当...时候；一辆汽车当飞跃隧道的时候。