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】

試題分析：考查時態(tài)。由句中的all the morning和finished it yet.可知我一直在忙于這個報告，have been doing表示從過去一直持續(xù)到現(xiàn)在的動作。句意：我整個早上都在寫關(guān)于我家鄉(xiāng)空氣污染的報告，至今還未完成。故選B

考點：考查時態(tài)

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