He is afraid to face the difficulty he thinks he'll have ________ the driving test tomorrow; he finds it difficult ________ rid of the worries.

A．passed; to get

B．passing; to get

C．to pass; getting

D．in passing; in getting

阴阳比较完整而简要的概念是（）。

A.事物的对立

B.事物的对立统一

C.事物的一分为二

D.事物内部的一分为二

E.事物特定属性的一分为二