look back
问题描述：
look back
He often stopped at the sound of his own steps and was afraid to look ____ his shoulder.
a.over b.back
我觉得应该是back,可是答案是A．．．为什么?
答
look over
从...上面看, 察看
首先眼睛在肩膀的上面,
他经常因自己的脚步而停下来,害怕去看自己的肩膀.
look back指回头看,要是回头看,眼睛可是看不到肩膀的哦.~