开车时使用手机会导致严重事故。
Using a mobile phone while driving can ___cause serious accidents.
困难的驾驶条件导致了多起事故。
The difficult driving conditions ___caused several accidents.
摄入过多糖分会导致牙齿问题。
Too much sugar ___causes tooth problems.
睡眠不足会导致健康问题。
Not getting enough sleep can ___cause health problems.
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