17. The girl was crying when a fairy ……………. A. appeared B. was appearing C. appears D. is appearing 18. She is ……………… a singer nor an actress. A. neither B. either C. nor D. both 19.The children are playing ………………… in the schoolyard. A. happy B. happily C. happier D. happiness 20. Everyone must remember………………… lies. A. don’t tell B.not tell C. to tell not D. not to tell