Evidenceofapowerfulvolcano,whi

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更新 2022-09-03
科目英语
题型单选题
难度较难
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Evidence of a powerful volcano, which erupted under the ice sheet of West Antarctica around 325BC and might still be active now, __________ so far by British scientists.

A．confirmed	B．has confirmed
C．is confirmed	D．has been confirmed

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