as soon as he________,he began reading with great attention 选set out 还是came out

题目

as soon as he________,he began reading with great attention 选set out 还是came out
为什么,我感觉都能说通

答案

选set out,意思是：出发,动身
整句意思是：他一出发,就开始专注地看书.
come out 的意思是：出来,出现,跟原句意思不太相符啊