题目

________ what you're doing today important, because you're trading a day of your lifefor it A . Make B . To make C . Making D . Made 答案：A寒潮所带来的强冷空气主要来自于A. 青藏高原 B. 新疆C. 蒙古、西伯利亚地区 D. 北冰洋