____rapidly by the body,sugar provides a quick energy source
问题描述：
____rapidly by the body,sugar provides a quick energy source
A Digested B Digesting C To digest D Having digested
答
A
关键词,主句主语sugar,所以要被动,是被消化吸收的关系
把省略句补全,就是（When sugar is） digested rapidly by the body,it provides a quick energy source
当糖分被人体快速吸收以后,它（糖分）会提供快速的能量来源