只剩两个~怎么比？在线等！

sierrapan

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 3.47 billion years old and thus is evidence
of the earliest known asteroid impact on earth
 
 has been dated to be 3.47 billion years old and thus is  
 
 has been dated at 3.47 billion years old and thus  
 
 have been dated to be 3.47 billion years old and thus are  
 
 have been dated as being 3.47 billion years old and thus  
 
 have been dated at 3.47 billion years old and thus are  
CE怎么比？

sierrapan

答案是E

conia

背下来，：）

Boot

去听听GWD的录音吧，这题有讲到，词组意思的细微差别。

aeoluseros

这里其实...date to be肯定就错了，要用也使用date to 3.47 million years这种
但是date to中的to表达了一种趋向性，所以后面要用ago这种词：date to 3.47 million years ago。
而at是强调了一个时间点，所以date at 3.47 million years old的搭配更为合理。

lolmandy

date to be 倾向于说date后使之变为XX million years old... 个人理解

sierrapan

哪里有听的？