【正确答案】 D

【答案解析】[解析] 画线词tidy为形容词，意为“整齐的”。A项messy意为“凌乱的，肮脏的”；例：She doesn"t know how to tidy up the messy room.她不知道该怎样整理凌乱的房间。B项organized意为“有条理的”；例：The article is loosely organized.这篇文章结构松散。C项beautiful意为“美丽的，美好的”；例：It"s good to rest one"s eyes on such a beautiful view.观看这样的美景使人赏心悦目。D项neat意为“整洁的，齐整的”；例：Each sheet was covered with small, neat handwriting.每张纸上都写满了工整的小字。故本题选D。