55. According to United States Air Force officials, a cannon shooting dead chickens at airplanes has proved helpful to demonstrate what kind of damage can result when jets fly into a flock of large birds. (A) shooting dead chickens at airplanes has proved helpful to demonstrate (B) shooting dead chickens at airplanes has proved itself helpful as a demonstration of (C) shooting dead chickens at airplanes proves itself helpful as demonstrating (D) that shoots dead chickens at airplanes proves itself helpful to demonstrate (E) that shoots dead chickens at airplanes has proved helpful in demonstrating
答案E。
1，这题以前有考友问过，争论主要在A为什么不对。
以前给的答复有： In A, the logical subject of " to demostrate" probably is " a canon", while " in demostrating" focus the way in which it is helpful.
名词+现在分词作定语：意思是“总是。。。” 名词+that 从句作定语，意思是：“在具体时间。。。” in doing ........... 在某一方面
在我看来，A的问题是否应该在helpfu的固定用法上：be helpful in doing? 我的理解对吗？
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发表于 2003-10-28 21:16:00
