It was a sunny afternoon. Sam and his sister Lily were helping Mom ______ the room.

“Hey, Sam,” said Mom. “Would you please take these paper-towel tubes (纸巾内管) out?” Sam looked at the tubes and something came to him. He asked, “Could I use them to make a ______?” “Great idea!” said Mom. “Do we have any other good recycling materials (可回收材料)?” asked Sam. “Come on. Let’s go and see what else we can ______ in our house,” said Mom.

Then, they walked around. “This box would be good,” Sam said. “But you ______ it with many books.” “I am going to put those books on the shelves (书架). Can you give me a hand? Then you can have the box,” said Mom, “Sure, no problem!” said Sam. “Now I only need several more things.” Sam ______ carried all his materials. He sat on the floor, ______ and gluing (粘贴) all afternoon.

“I like your robot,” said Lily. “Thanks. But his ______ can’t work now, and I can’t make it,” said Sam. “Hmm,” said Lily. She got an idea. She ______. With an old hat she ran right back. “Remember this hat?” asked Lily. “I wore it when I was a baby. Now it’s too ______ for me. What about making its head?” “Thanks, it’s good!” said Sam. “What do you think, Mr. Robot?”

“I love it and you are really ______ in making things out of recycling materials,” said Mr. Robot in a funny voice.