单选题 The spring will continue to bounce. It will bounce at its natural frequency. It will do this until all of the energy is used up. This is energy that was originally put into it.
【正确答案】 C
【答案解析】解析：题干中有四个短句，但是这四个短句可以用复合句的形式重组，因此C项“不连贯句”正确。