如何使用 "became" 造句

1. The crisis became particularly severe in recent weeks .
近几周来爱尔兰危机变得尤其严重。
2. Suddenly this darkness became terrible .
突然这种黑暗变得非常可怕。
3. Then it just became normal .
然而这一切开始变得正常了。
4. China became equal but extraordinarily poor .
中国变得平等但相当贫困。
5. Their mother suddenly became very stern .
母亲一下子变得严肃起来。