comb怎么描述例如：wallet——it is not very big .We can put

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b----the little tool,you use it to tidy up you hair.
skateboard----it is on the ground or sometimes has wheels.you usually use it to make yourself flow forward on ground,for fun often.
watch---you often wear it on your wrist.you use it to show the time.
======以下答案可供参考======
供参考答案1:
it is made of wood or plastic, we can use it to b our hair