Based on the passage provided, here are the correct answers for the questions:

1. The eco houseboat will be:
- **A. In the air**

2. The word "stable" in the second paragraph is closest in meaning to:
- **C. not sinking**

3. What is not about the kitchen in the houseboat?
- **A. robot**

4. Which of the following is NOT true?
- **B. The eco houseboat can make power.** (This statement seems incorrect based on common understanding unless specifically mentioned in the text)

5. What is the main idea of the passage?
- **D. A special kind of house.**

If you have any further questions or need explanations for any answer, feel free to ask!