【题目】 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
在线课程【答案】D
【解析】
试题分析：考查动词。句意：全国烟雾作为不断的提醒者,表明是时候我们反思自己。反思自己的过去，时态为过去时，选项D正确。