come from,come across,come to区别

题目

come from,come across,come to区别
When the wounded soldier __________,he was too weak to talk.
A.came from
B.came across
C.came on
D.came to
我选了B
请大人说说这四个选项的区别

答案

come to 是苏醒的意思.
come from 是从何处来
come across 是碰见,遇见的意思.