In the past ten years,they _three great scientific experimee
In the past ten years,they _three great scientific experimeent.A finished B have finished
C had finished D have been finished
C had finished D have been finished
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B
In the past ten years是从过去到现在的一段时间,用现在完成时.
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟!请记得采纳,多谢!
In the past ten years是从过去到现在的一段时间,用现在完成时.
祝你学习进步,更上一层楼! (*^__^*)
不明白的再问哟!请记得采纳,多谢!
1年前
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你能帮帮他们吗