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Hardly__come into the room__the meeting began.A.had they;when B.did they;then C.they did;then如果选A的话,那为什么用come而不是came?

题目详情
Hardly__come into the room__the meeting began.A.had they;when B.did they;then C.they did;then
如果选A的话,那为什么用come而不是came?
▼优质解答
答案和解析
come的过去式是came,过去分词是come哦