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标题: prep 2#215 请进～ [打印本页]

作者: 幸福的莹莹 时间: 2009-9-17 01:02
标题: prep 2#215 请进～

215.
(30128-!-item-!-188;#058&004836) (GWD-31-Q28)

Rock samples taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs has been dated to be 3.47 billion 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

句子结构：Rock samples ~~taken from the remains of an asteroid about twice the size of the 6-mile-wide asteroid that eradicated the dinosaurs~~
have been dated at 3.47 billion years old and thus are evidence of the earliest known asteroid impact on Earth.

请教下～Date at/to be用法的区别

作者: 幸福的莹莹 时间: 2009-9-18 00:08

顶～

作者: terry_run 时间: 2009-9-18 00:16
the correct idiom is "date at XXXX years old "

作者: daybreakwing 时间: 2009-9-18 00:20
搭配是be dated to sth，没有be dated to be，追溯到多少年前用be dated at，逻辑上分析的话be dated to be有将来时态的意思，用在上溯这个过程中不合适

作者: 幸福的莹莹 时间: 2009-9-18 00:57
非常感谢楼上2位的解答～谢谢～～～

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