阅读下面材料,在空白处填入1个适当的单词或括号内单词的正确形式。
Nut carving, known as Hediao in Chinese, generally refers to two kinds of carvings that use the fruit’s pit(核), like peach pits, and walnut(核桃) as the raw material.
It gained popularity in the Song Dynasty, and by the Ming Dynasty, the art form 【小题1】(make)very high achievements, with many of the rich and high officials considering 【小题2】 fashionable to wear a piece of nut carving around. The ancient artists left their accomplished skills on those small 【小题3】(work), which featured human figures, various birds and beasts, and even lines of poems.
The hardest thing about nut carving is 【小题4】 each piece of the raw material is different in texture (纹理) and flexibility. By looking at the textures on the surface of a walnut, a seasoned carving artist can basically tell whether the piece can 【小题5】 (use) for carving. In carving the artwork, the artist should first have 【小题6】 basic blueprint in his mind according to the textures on the surface, and then make adjustments when meeting any 【小题7】(hide) holes in the pits or walnuts. The whole carving process 【小题8】(constant) requires reconsideration and creation, and there is no established pattern to follow.
【小题9】(be) a good nut carver, one needs not only the basic skills in painting, calligraphy, and carving, but special materials, knives, good 【小题10】 (observe), flexible fingers, unique ideas, and exceptional patience.