--- It’s the fourth time that heavy smog(雾霾) has hit the city this month.
--- It’s high time we measures to fight air pollution.
A. will take
B. took
C. to take
D. taking
网友回答
A. will take
(答案→)B. took
C. to take
D. taking
解析：
试题分析:考查动词时态。“It is high time +that 从句”是固定句型“到了做某事的时间了”从句中用一般过去时或者should +动词原形；所以B选项正确。句意：--这是雾霾天气在这个月中第四次侵扰这座城市了。--到了我们采取措施消灭空气污染的时候了。