—I noticed him          in the playground just now.

    This boy is Peter .He is from America．He is ten years old . His hair is yellow.Peter can play basketball. This is his school.It's very big. There are forty students in his class. Miss White is his English teacher. Peter is good at English.

明清时期佛山剪纸有专门行业大量生产，甚至远销南洋各国。佛山剪纸盛行的主要原因是(    )