3. When you are reading a novel, you should check your understanding of the content after ________.
  A. every section
B. every ten or twelve pages   
C. every four or five pages
  D. every chapter        
出自:大学英语第二册

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块