I haven't read ____ of his books, but judging from the one I have read I think he's a very promising writer. [ ]

A. any

B. none

C. both

D. either

根据《中国农业银行信贷业务担保管理办法》（农银发[2007]234文号）规定，国有建设用地使用权及其地上建筑物，抵押率最高不超过70%，但以正在建造的建筑物、集体建设用地使用权及其地上建筑物抵押的，最高不超过50%。