Ответ: 1. Is my favourite food sandwiches? 2. Is he happy today? 3. Is it my birthday?
Краткое пояснение: Перефразировали утвердительные предложения в вопросительные.
- 1. My favourite food is sandwiches. - Is my favourite food sandwiches?
- 2. He is happy today. - Is he happy today?
- 3. It's my birthday. - Is it my birthday?