More than 10,000 relics, ____ between 5,000 to 3,000 B.C., ___ at Sanxingdui sin
题型：不详难度：来源：
More than 10,000 relics, ____ between 5,000 to 3,000 B.C., ___ at Sanxingdui since it was first discovered.
A. dating back to, was dug up B. dating back to, have been dug up
C. dated back to, has been dug up D. dated back to, were dug up |
答案
| B |
解析
| 考查动词及非谓语动词。date back to追溯到，不可用被动，故用现在分词；根据语境时态可知用现在完成时，选B . |
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