More than 10,000 relics, ____ between 5,000 to 3,000 BC, ____ 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

旅客携带伴侣犬、猫进境，须持( )官方兽医检疫机关出具的检疫证书和狂犬病免疫证书向海关申报。

A．输入国

B．当地检验检疫机构

C．输出国

D．以上都可以