Im afraid this painting is not by Picasso. Its only a copy and so its .A. pricelessB. i

问题补充：

Im afraid this painting is not by Picasso. Its only a copy and so its .

A. priceless

B. invaluable

C. unworthy

D. worthless

答案：

A. priceless

B. invaluable

C. unworthy

D. worthless

解析： 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。