(became, become) [用作系动词]
At his words she became angrier.
听了他的话，她更生气了。
At last the truth became known.
最后真相大白了。
Pollution from cars has become a major problem.
汽车造成的污染已成主要问题。
He loved experimenting and his aim was to become a scientist like his father.
他热爱做实验，他的目标就是要成为一个像父亲那样的科学家。
What has become of him?
他后来情况怎样？
What will become of you if you lose the game?
比赛要是输了，你会怎么样？