阅读下列短文,从26~40各题所给的A、B、C和D项中选出最佳选项Brian looked at the ugly gray walls of his bedroom. Soon the hated walls would be covered, but not with paint as he had first planned. Brian had been disappointed to learn that the house owner would not allow painting. For weeks he was unable to understand: without using paint, how could he cover the walls? But, as Grandmother always said, "Necessity is the mother of invention." So Brian did some thinking, and with a little help from his mother, he came up with a great plan.
This morning, Mom had needed to stop at the mall to buy a book and Brian went along. There, Brian noticed a large poster of Harry Potter and the Hogwarts School on the wall. Next to it was a poster showing the cover of No Arm in Left Field, a baseball novel that Brian had read several times. "This is it," Brian thought excitedly. "I'll cover the walls with posters!"
When he left the mall, Brian had an armful of posters and a box of tacks (大头钉). At home, he headed straight to his room. First he took out the posters and spread them out on his bed, his desk, and most of the floor. Next he found out the size of each poster, and then the walls. He wanted to cover as much of those ugly walls as possible! It took all afternoon to work out the best preparation. He drew it on paper, making changes until it was just right. When Dad came home at dinnertime, Brian was ready to tack up the posters.
"Come see my room, Dad," called Brian. "It's going to be great!" But when Dad came into the bedroom, he looked worried. "The house owner said we could not put any holes in the walls. You can't use tacks, Brian. I am sorry."
Brian's joy slowly disappeared. He would stay with the boring gray walls forever. Maybe there was no way to solve this problem after all. How could you hang posters without using tacks? After all, posters would not stick to the walls by themselves!
"What would stick to the walls?" Brian wondered. Then he smiled. Tape, that's what! Brian took a piece of tape and made it into a circle. He made sure the sticky part of the tape was on the outside. This would work, for sure!