There was an expression on her face when she came in.A. amusedB. amusingC. amuseD. amusin

问题补充：

There was an expression on her face when she came in.

A. amused

B. amusing

C. amuse

D. amusingly

答案：

(答案→)A. amused

B. amusing

C. amuse

D. amusingly

解析：本题考查非谓语动词的用法。说明或修饰的名词是face，look，smile，voice，scream，expression等表现人的情感的词，多用­ed形式的形容词，表示人的自身特征。