—What do you think of this matter?—This is a matter of ________ importance, I think.

—What do you think of this matter?

—This is a matter of ________ importance, I think.

A.especial

B.common

C.usual

D.special

答案及解析： D

解析：

导解：表示“特别重要的”．common表示“普通的”，usual表示“通常的”，均不符合句意．