单选题 —Have you read this book?
—Yes. But that one is ______ worth reading I suggest you read it if you have time.

【正确答案】 C

【答案解析】[考点] 比较级在短语中的应用
[解析] be well worth doing意为“十分值得做”，“更值得做”为be better worth doing。根据题意选C。