I'm afraid this painting is not by Picasso. It's only a copy and so it's _____
A.pricelessB.invaluableC.unworthyD.worthless在线课程D
worthless.[注释] worthless 无价值的, 无用的。Priceless 无价的, 贵重的, 无法估价的：a priceless treasure 无价之宝。Invaluable 无法估价的, 非常宝贵的。Unworthy 不值得的, 不配的; 无价值的。