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This nationwide smog should serve as a reminder to all, indicating a high time that we ______ on what we've done to the environment.
A.have reflectedB.are reflectingC.will reflectD.reflected
D

试题分析:句意:全球范围的雾霾应该对所有的人是个提醒,表明是我们该反思我们对环境做了什么的时候了。这是句型:It’s high time that+虚拟语气的变形,that从句中用一般过去式或should do表示虚拟语气,所以选D。
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