Please choose the correct ending to complete the given sentence: Health: [header] How to stop belching [title] Chew with your mouth closed. [step] Seal your lips tightly immediately after taking a bite of food or sip of a drink. Don't open them up again until you've swallowed all of the food or liquid.

Ending1: This ensures that the food isn't trapped in your esophagus or throat. [title] Hold the breath with your tongue if you accidentally swallow something. Ending2: This will keep you from swallowing extra air by accident. [substeps] Similarly, avoid talking while you are chewing. Ending3: Only close your mouth when you understand that there are no ways to stop the belching. Anyone who holds a double serving of food or drink in their mouth must reswallow the food. Ending4: [title] Remind yourself that belching is choking. [step] When you're eating or drinking you swallow food as soon as you chew.

Answer format: ending1/ending2/ending3/ending4