hear sb do和hear sb doing的区别

题目

hear sb do和hear sb doing的区别
Do you often hear John____in his room?-yes.Listen!Now wo can hear him____in his room.
A sing;to sing B singing;singing C sing;singing D to sing;singing

答案

选C hear sb do sth.是表示动作的固定搭配.hear sb doing 是表示听到某人正在做什么的搭配