题目

 ---Each of the students, working hard at his or her lesson,        to go to university.---So do I.A. hope                               B. hopes                C. hoping                      D. hoped 答案：B一块铁块的质量会发生变化的情况是（　　） A．将它熔化成铁水 B．磨掉铁块一个角 C．把它轧成薄铁片 D．从地球运到月球