问题描述：
--- you ---- your homework Yes,l---it a moment ago.
A have done finished B did do finished C have done finished D will do finish 选A为什么?我想选B感觉比较对!这里的语法是什么?
A have done finished B did do finished C have done finished D will do finish 选A为什么?我想选B感觉比较对!这里的语法是什么?
问题解答：
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