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I a report about the air pollution in my hometown all the morning and haven’t finished it yet.

A. wrote B. have been writing

C. was writing D. have written

B

【解析】

试题分析:考查时态。由句中的all the morning和finished it yet.可知我一直在忙于这个报告,have been doing表示从过去一直持续到现在的动作。句意:我整个早上都在写关于我家乡空气污染的报告,至今还未完成。故选B

考点:考查时态

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