题目

The newspaper says if more underground lines          next year, it will be much easier for people to travel around Nanjing.       A. will be finished          B. have finished      C. are finishing       D. are finished 答案：D在北方的冬季，常见的几种物态变化现象中，属于凝华的是（　　）A．室外冻冰的衣服变干B．房间窗户玻璃的内表面出现冰花C．湖面结了厚厚的一层冰D．正在跑步的人，口中呼出“白气”