Expert Edward sometimes shares ____ at school. One day he said, “Rats sometimes ____ when you tickle them.” When George heard that, his eyes ____. He has ____ named Sniff, and he often plays with him. At home, George put Sniff on the floor and ____. Nothing happened. Sniff just ____. George tried again. And again. Still ____. Finally, he ____. “Every time I tickle Sniff, he only moves his ears. He never ____,” George complained. “Of course,” said Edward. “Rats sometimes laugh when you tickle them, but ____ can’t hear it. People must use a special ____ to catch the sound.” “I see,” said George. “From today on, I’m going to start ____ for one!” Now, when George gets his pocket money, he doesn’t buy any sweets or snacks, he saves it to buy ____. He’s looking forward to hearing Sniff’s ____.

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