At first the bag seems made of real leather. But actually it is just an imitation.　A. si

问题补充：

At first , the bag seems made of real leather. But actually it is just an imitation.

A. sight

B. look

C. appearance

D. view

答案：

(答案→)A. sight

B. look

C. appearance

D. view

解析： at first sight乍一看，初看起来。imitation仿制品。