--What are your school Jack? Well at school we have to wear school uniforms.A. subje

问题补充：

--What are your school , Jack?

-- Well, at school we have to wear school uniforms.

A. subjects

B. uniforms

C. classes

D. rules

答案：

A. subjects

B. uniforms

C. classes

(答案→)D. rules

解析：句意：你们学校有什么规定，杰克？好吧，我们在学校必须穿校服。subjects 科目；uniforms制服；classes 班级； rules规则，规定。根据答语we have to wear school uniforms.可知该选D。