Which pronoun below is the missing word in the text:

Answer questions 26 – 28 according to the text:

“Once upon a time in a small town in the south of a tropical country, there was a little girl called Amanda. She lived in a very quiet and peaceful neighborhood. Amanda was the naughtiest girl in this neighborhood. She had a younger brother. His name was Arthur. He was as naughty as _____. They loved to do everything together. Their mother, Jill, used to call them lightning and thunder. One day, Jill looked at herself on the glass of the fish tank and noticed it was filthy. A couple of hours later, on the very same day, Amanda and Arthur took their toothbrushes and carefully cleaned all the fishes in the fish tank. Despite Amanda and her brother’s good will, they were grounded for a month.”