单选题I think your advice 

问题补充：

单选题Ithinkyouradviceisofgreat________tomeandit’s_______.A.valuable, worth givingB.valuable, worth taking itC.value, worth going itD.value, worth taking

答案：

D解析of为介词，value为不可数名词，be worth doing ，表示值得做某事，故选