Please choose the correct ending to complete the given sentence: Health: [header] How to have great teeth [title] Brush your teeth. [step] Brushing is one of the best ways to make your teeth look--and feel--great. However, the act of brushing isn't enough.

Ending1: Brush your teeth every day, and you'll be able to : [substeps] Floss good. Push your toothbrush down the front of your teeth and focus on brushing each tooth individually, taking care not to brush hard enough or miss an tooth. Ending2: You must use simple, circular motions or the brush can dull them. Be gentle, and brush for one second. Ending3: Not only do you want to keep your teeth clean, but you also need to pay attention to everything about your teeth and gums. The better you brush your teeth, the easier they will look. Ending4: You need to make sure that you are doing it correctly, and frequently. Many people think that more is better, but you should actually only brush twice a day.

Answer format: ending1/ending2/ending3/ending4