Respuesta:Here are the completed Zero conditional sentences:1. If you **heat** water to 100°C, it **boils**.2. The menu **does not appear** on the screen if you **press** this button twice.3. Put those plants in the sun. If they **don't get** enough light, they **die**.4. If you **do not have** the right password, you **cannot access** the website.5. My mum **does not sleep** well if she **drinks** coffee before bed.6. **Does** your teacher **get** annoyed if you **do not do** your homework?Let me know if you need anything else!