How much does it cost to become a member?
要成为会员得花多少钱？
The situation might all too easily have become a disaster.
这形势本来是很可能成为一场大灾难的。
Students should aim to become more independent of their teachers.
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。