问题描述：
-----Are you still very busy -----Yes,I ___the report for the manager and it won't take long .
A have just finished B am just finishing C had just finished D am just go to finish ,四项不知道改选哪个,感觉哪个都对,请各做解释,
A have just finished B am just finishing C had just finished D am just go to finish ,四项不知道改选哪个,感觉哪个都对,请各做解释,
问题解答：
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