问题
选择题
It is high time that we ____ the amount of carbon dioxide in our daily life.
A. reduce B reduced C will reduce D reduces
答案
B
题目分析：考查虚拟语气。固定句式 It is high time that sb 过去时/should+动词原形；是某人做某事的时候了。Should不可以省略。句意：是时候减少二氧化碳排放量的时候了。故B正确。
点评：固定句式 It is high time that sb 过去时/should+动词原形；是某人做某事的时候了。Should不可以省略。