题目
帮忙分析个英语单选题
By then,the flood that had happened in Bishan country of Chongqing ___ to the inner city,making it become an isolated
island.
A has B had been spread C has spread D has been spread
并且分析下时态,
By then,the flood that had happened in Bishan country of Chongqing ___ to the inner city,making it become an isolated
island.
A has B had been spread C has spread D has been spread
并且分析下时态,
提问时间：2021-03-26
答案
B, by then 到×时候为止,后面有had happened, 过去完成,保持时态一致,过去完成时,had^been spread, been这里不是被动哦
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