What the experthas said and done will be ________ to the department managers.

What the experthas said and done will be ________ to the department managers.

A.value

B.benefit

C.ofvaluable

D.of benefit

答案及解析： D

解析：

根据词词之间的关系排除A、B，没有be of valuable to这种用法，一般用bevaluable to，be of benefit表示“对……有益”。