become

The weather became warmer.

天气变暖和了。

Slowly my eyes became accustomed to the darkness.

我的眼睛渐渐适应了黑暗。

Helen became increasingly anxious about her husband’s strange behaviour.

海伦越来越担心她丈夫的反常行为。

Pollution from cars has become a major problem.

汽车污染已成为严重的问题。