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【題目】 The nationwide smog serves as a constant reminder, indicating that it’s high time we ______ on ourselves.

A. would reflect B. have reflected

C. are reflecting D. reflected

【答案】D

【解析】試題分析：考查動詞。句意：全國煙霧作為不斷的提醒者,表明是時候我們反思自己。反思自己的過去，時態(tài)為過去時，選項D正確。

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