She resigned because of ill health.

　　她因健康狀況不佳而辭職。

　　I was angry because I played so badly.

　　我生氣因為我彈得這么糟。

　　The road is closed because of the snow.

　　這條路因下雪而封閉。

　　Many diets fail because they are boring.

　　許多規(guī)定飲食因單調乏味都不奏效。

　　He walked slowly because of his bad leg.

　　他因為腿不方便而行走緩慢。