单选题 Evidence from ancient fossils indicates the scorpion may had been among the first land animals.
【正确答案】 C
【答案解析】答案:C:have been 分析:may作为情态动词,后面的助动词have应该用原形。 参考译文:古代化石的迹象表明蝎可能是第一批陆地动物。