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# After more than four decades of research and development, a

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Manager
Joined: 12 Apr 2009
Posts: 198

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20 May 2009, 17:52
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After more than four decades of research and development, a new type of jet engine is being tested that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit.

A. tested that could eventually propel aircraft anywhere in the world within two hours or help

B. tested that could eventually have the capability of propelling aircraft anywhere in the world within two hours or to help

C. tested, eventually able to propel aircraft anywhere in the world within two hours, or helping

D. tested, and it eventually could propel aircraft anywhere in the world within two hours, or helping

E. tested, and it could eventually have the capability to propel aircraft anywhere in the world within two hours or help

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Director
Joined: 29 Aug 2005
Posts: 808

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21 May 2009, 02:46
A.
The issue with the question is that you need to find a way to modify "a new type of jet engine" with a "that" clause. If you put "that" clause right after the above noun phrase, the verb will be too distant from the subject. "A" shows the best way around the issue - here "that" clause can only modify the noun phrase.
Other choices suffer at least from bad word choice (e.g. "have the capability of propelling") or parallelism issue (we need "propel ...or help")
nightwing79 wrote:
After more than four decades of research and development, a new type of jet engine is being tested that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit.

A. tested that could eventually propel aircraft anywhere in the world within two hours or help

B. tested that could eventually have the capability of propelling aircraft anywhere in the world within two hours or to help

C. tested, eventually able to propel aircraft anywhere in the world within two hours, or helping

D. tested, and it eventually could propel aircraft anywhere in the world within two hours, or helping

E. tested, and it could eventually have the capability to propel aircraft anywhere in the world within two hours or help
Senior Manager
Joined: 08 Nov 2008
Posts: 258

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21 May 2009, 04:14
A ..reason well explain by seofah

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Re: Jet Engine &nbs [#permalink] 21 May 2009, 04:14
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