爸爸用他的小折刀帮我在木头上削了个小马。
Dad helped me ___whittle a little horse out of wood with his pocket knife.
他慢慢地把木棍削成了一把小刀。
He ___whittled the stick down into a small knife.
爷爷用他的小刀慢慢地削着一根树枝。
Grandpa slowly ___whittles a stick with his pocket knife.
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