It was 7 p.m., and Nima, Rubin, and Saira were at the dinner table. The pressure cooker was on the stove, the vegetables were enjoying the steam and heat from the pan, Rubin was drinking a glass of lukewarm water, and Saira was entertaining the hungry rat in her stomach. There was an unexpected knock on the door.Nima froze and thought on about the incident at noon.
. Saira opened the door and saw Klaus holding some books. "What are you doing here, Klaus?" enquired Saira. "I think you forgot, we discussed solving math problems together last week, didn't we?" Klaus said. Saira's face became pale, as if she had been caught cheating by principal. "i..i.." she muttered. Nina yelled, "Saira, aren't you going to let Klaus in?" Klaus was invited in by Saira. They both went to Saira's room first, put all the books on the shelf, and then came down. They had a good time at dinner. Nina was looking for the right moment to clarify all that had happened to her today at noon. Saira ran over towards upstair, as if she had something interesting to show .
Klaus pretended to accompany her, but after a minute, he rushed and told Nima and Rubin everything that had happened at school today. Nima also spoke everything. but everybody glanced at each other in horror when Rubin said.....