the diamond mine ____ accidentally by a little boy when he was playing hideA,discoveredB,was discoveredC,has been discoveredD,would discover是不是选A?请详细解析,谢谢!

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the diamond mine ____ accidentally by a little boy when he was playing hideA,discoveredB,was discoveredC,has been discoveredD,would discover是不是选A?请详细解析,谢谢!
the diamond mine ____ accidentally by a little boy when he was playing hide
A,discovered
B,was discovered
C,has been discovered
D,would discover
是不是选A?请详细解析,谢谢!

the diamond mine ____ accidentally by a little boy when he was playing hideA,discoveredB,was discoveredC,has been discoveredD,would discover是不是选A?请详细解析,谢谢!
选B
钻石矿是被发现的,要用被动语态.而且是过去的事情,过去时.
那个钻石矿是被一个小男孩儿子玩藏猫猫时发现的.

B,was discovered
钻石矿被发现,用被动
发现在过去,用一般过去时

选B。 discover sth ,这里不过采用被动语态而已 ,排D除A、D,根据后半句时态,排除C,正确答案B。
The diamond mine was discovered accidentally by a little boy when he was playing hide.
那个钻石矿是被一个小男孩儿子玩藏猫猫时偶然发现的。
望采纳,祝开心~!