【SAT语法】一道SAT的IE语法题

问题描述:

【SAT语法】一道SAT的IE语法题
(Centuries ago), the Greek physician Hippocrates (advocated) collecting data (from) patients in order (to be drawing) conclusionand diagnose diseases. (No error.)
Q:错误的应该是哪一个?是(from)还是(to be drawing)?

(to draw)