One day, some children were playing hide-and-seek 11. ______ in an garden. The garden was big and full of man-made 12. ______ stones. The children knew them very well because 13. ______ they played there very often. Then, the youngest of 14. ______ them saw a tall jar, and had an idea. He decided climb 15. ______ into it and hide himself. However, it was filled of 16. ______ waters. As soon as he got into it and began to 17. ______ drown, he let out a cry of help. When all were frightened, 18. ______ one of their picked up a stone and threw it hard at 19. ______ the jar. The jar was broke and the boy was saved. 20. ______