Li Ming made great progress ________ of his parents.[ ]

A．to their much delight

B．to the much delight

C．to much delight

D．much to the delight

重要单证执行（）双人管理、账实分管、证印分管制度。

A.双人管理

B.帐实分管

C.证印分管

D.帐帐分管