21.______ the cry for help,the people immediately rushed out of the rooms.
问题描述：
21.______ the cry for help,the people immediately rushed out of the rooms.
A.To hear B.Hearing C.Heard D.They hearing
应该选什么?
答
B.Hearing 这是现在分词结构作时间状语,相当于时间状语从句Hearing the cry for help = when the people heard the cry for help 状语的动作hear与其逻辑主语the people 构成主谓关系,故用现在分词形式.句意:人们一...谢谢，还有一题，Mary is always the last _______ at the office.A. arriving B. arrived C. to arrive D. arrives应该选什么？C. to arrive 不定式作定语修饰the last . 句意: 玛丽总是最后一个到达办公室的.