become是什么意思

双语例句：

Students should aim to become more independent of their teachers.

学生应该努力逐渐减少对老师的依赖。

I see he's become a family man.

我发觉他已变得很恋家。

The environment has become a very hot issue.

环境已成为很热门的.话题。

He became very weak towards the end of his life.

他临终时很虚弱。

What became of that student who used to live with you?

以前和你住在一起的那个学生后来怎么样了？