Please choose the correct ending to complete the given sentence: Health: [header] How to get sweet, fresh breath [title] Brush your teeth. [step] Place fluoride toothpaste onto an electric or soft-bristled toothbrush. Hold the brush at an angle and brush using short and gentle strokes.

Ending1: Make sure that you use toothpaste that is at least 400-600 times as effective as fluoride. Rinse and re-wet your toothbrush when needed. Ending2: [substeps] Fluoride toothpaste is thought to improve both facial and dental health. It means that it removes plaque, stops bacteria in the mouth and can help fight off bad breath. Ending3: Brush the surfaces of your teeth as well as the part where the teeth meet the gums. Brush twice a day for at least two minutes. Ending4: Rinse the brush after each stroke so clean the bristles. Repeat the brushing process if necessary, or if your toothbrush becomes dirty, you can use toothpaste that has fluoride on it.

Answer format: ending1/ending2/ending3/ending4