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# Rock samples taken from the remains of an asteroid about

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Intern
Joined: 18 Aug 2004
Posts: 4

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Rock samples taken from the remains of an asteroid about [#permalink]

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06 Oct 2004, 12:43
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Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid eradicated the dinosaurs has been dated to be 3.47billion years old and thus is evidence of the earliest known asteroid impact on earth.
A. has been dated to be 3.47 billion years old and thus is
B. has been dated at 3.47 billion years old and thus
C. have been dated to be 3.47 billion years old and thus are
D. have been dated as being 3.47 billion years old and thus
E. have been dated at 3.47 billion years old and thus are

WHICH ONE IS BETTER ?C OR E ??
THANKS

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Director
Joined: 31 Aug 2004
Posts: 606

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06 Oct 2004, 14:24
For what reason is E better than C ? I must admit I still do not know which one to choose...

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Director
Joined: 08 Jul 2004
Posts: 595

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06 Oct 2004, 15:55
I guess to be is redundant. But I would not like to see dated at as well unless it is an idiom.
S

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06 Oct 2004, 15:55
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# Rock samples taken from the remains of an asteroid about

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