问题描述：
You are late for school again.The class___for ten minutes.
A:has start B:has been started C:is having D:has been on
为什么选D不选B呢?麻烦个位大侠给解释解释.
A:has start B:has been started C:is having D:has been on
为什么选D不选B呢?麻烦个位大侠给解释解释.
问题解答：
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