28: 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

I think it should be E,but someone view C ????

dated at. 后面跟了一个表示具体多少时间

不太同意E

at xx years old? 应该是be years old 吧。 at xxx years 说得通

应该是e吧

date to  没有这个结构...

----------------

有待讨论.......

 求date相关用法...有 date to这个么？

Archaeological finds dated to 35,000 years

“We now hope Rio will redesign the mine to protect this site, so that we can begin a major salvage operation”

ANCIENT Aboriginal tools found on a Pilbara mine site in Western Australia have been dated at 35,000 years - among the oldest so far discovered in Australia.

		http://news.nationalgeographic.com/news/2003/07/0717_030717_bajarockart.html The giant rock art murals that grace the walls of hundreds of shelters and caves found in the hardscrabble hills of the high sierra in Baja California Sur, Mexico, date back as far as 7,500 years ago, according to data from an ongoing study of the area. http://www.manhattangmat.com/forums/arco-practice-test-q-t612.html Answer E. "Remnants" pairs with "have been" so eliminate A and B. Idiom is "dated at" so eliminate C and D. "Dated to be" is incorrect.

找了一些资料，基本确定这么一个顺序

dated to 是最好的，没有问题。dated at 次之。但是dated to be错误

choose e

to be 表示将来， date to be 语义上不合理

The rock samples have been age-dated at 3.47 billion years old and are the oldest known evidence of an asteroid impact on the Earth, said Donald R. Lowe, ...
 

Google 上搜到的句子．选Ｅ，没错的！