求小学生英语谜语。谜底是星星

1. What is clean when it is black and dirty when it is white?
2. What has a round face and two thin hands, one hand short, one hand long?
3. What is big and bright during the day and we can’t see it at night?
4. I am small. I can fly. I like singing in the sky. What am I?
5. Which letter is a drink?
6. Which letter is around an island?
7. Which letter is an animal?
8. Which letter is a kind of vegetable?
9. Which is the longest English word? Why?
10. Which letter is a question?
11. Which letter is a part of your face?
12. I am very big and heavy. I have a long nose and big ears. What am I ?
13. I am the tallest animal in the world. What am I ?
14. I live in the sea. I am the biggest animal in the sea. What am I ?
15. What do you call your father’s father’s only son?
16. What is the biggest ant in the world?
17. What is in the middle of the world?
18. What do you call your father-in-law's only ch