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- What's up? You didn't pick up the phone just now.
- I'm sorry that I     dancing with music on, but it's done now.

A.practisedB.was practisingC.am practisingD.have practlised

B

解析试题分析:考查时态。句意:—怎么了?刚才你为什么不接电话?—对不起。刚才我正在随着音乐在跳舞。现在已经跳完了。根据句意是指刚刚地方打电话的时候所发生的事情,故使用过去进行时表示在过去的一个时间点或者时间段里所发生的事情。故B正确。
考点:考查时态
点评:过去进行时是指在过去的一个时间点或者时间段里所发生的事情。在解题的时候要和上下文的语境相结合。

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