date to be 和 date at 的用法求解

renee17831 · 发表于 2011-11-6 14:19:30

28. GWD31-Q28
Rock samples taken from the remains of an asteroid about twice the size of the 6-nuke-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 3.47billion 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

这道GWD的语法题，C和E有什么区别呢，正确答案是E

Karen点点 · 发表于 2011-11-6 22:10:51

我记得这道题GWD注释上的解释是date to 后面是ago，而且to后面只能跟年代数字（不需要be）；date at后面与old搭配。。。。

date to be 和 date at 的用法求解

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