他在青少年时期养成了吸烟习惯。

He developed a smoking ___habit in his teenage years.

他每天喝咖啡的习惯很难改掉。

His daily ___habit of drinking coffee is hard to break.

那位修女的黑色长袍是她宗教信仰的象征。

The nun's black ___habit symbolizes her religious devotion.

每天早晨喝杯咖啡已经成了他的习惯。

Having a cup of coffee every morning has become his ___habit.