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23. 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
答案是E，关键很多帖子说shooting错在表示一直在shoot，所以错，我觉得这道题目和此无关，主要是helpful in doing来判断的。各位有什么好的意见吗？
类似的如下题：
In April 1997, Hillary Rodham Clinton hosted an all-day White House scientific conference on new findings that indicates a child’s acquiring language, thinking, and emotional skills as an active process that may be largely completed before age three.
- that indicates a child’s acquiring language, thinking, and emotional skills as
- that are indicative of a child acquiring language, thinking, and emotional skills as
- to indicate that when a child acquires language, thinking, and emotional skills, that it is
- indicating that a child’s acquisition of language, thinking, and emotional skills is
- indicative of a child’s acquisition of language, thinking, and emotional skills as
此题中indicating也没感觉是动态的啊
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发表于 2011-5-1 11:33:28
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