标题: 麻烦解答 谢谢 [打印本页] 作者: scholar 时间: 2010-8-19 14:03 标题: 麻烦解答 谢谢 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 我选C 作者: Christianyang 时间: 2010-8-19 14:52
OG12 140的原题嘛。OG解释很清楚啊。date at作者: aeoluseros 时间: 2010-8-19 15:02
从来都没有date to be的用法，直接be dated to 3.47billion years ago(ago有向前的倾向所以和to搭配), 或者dated at 3.47 billion years old.