题目内容：

Erik rang his grandparents’ doorbell and silently wished the next four hours would go by quickly. He didn’t want to give up his entire Saturday afternoon at his grandparents’ house where there were no kids in the neighborhood.

“_______1. There’s tea and cake in the dining room, ” Grandma Bethany said, opening the door.

Cake? At least the first ten minutes would go by quickly. Suddenly Erik found a strange-looking key on the dining table. “_________2.”

“It opens the best room in this house,” Grandpa Bill whispered. “It’s the room I go to when your grandmother tries to make me help with the dishes.”

“__________3.” Erik asked.

“It’s a game room,” Grandpa Bill said. “Take the key and see if you can find the room.”

Erik stared at the key which looked old. Erik decided the oldest things in the house were probably upstairs in the attic(阁楼). He headed past the dining room and to the stairs.

Grandpa Bill shook his head._________ 4.

Erik thought about the oldest part of a house. “The basement! __________5.” He rushed to the basement door and opened it.

The basement was one giant room with a pool table(台球桌) in the middle.

“Wow!” Erik said.

“Ever learn to play pool?” Grandpa Bill asked, coming down the stairs.

“No,” Erik said.

“Well then, take a cue(球杆) and I’ll teach you. ”

Erik smiled. The next four hours were going to fly by.

A: You’re right on time.

B: It’s the first part that’s built.

C: What’s so special about the room?

D: What are you doing there, Erik ?

E: Grandpa Bill, what’s this funny key for?

F: Erik knew that meant he was going the wrong way.

G: Erik turned on the light and walked up the stairs.