When Helen saw his tutor nod to her she calmed down and went on with her performance. A.

问题补充：

When Helen saw his tutor nod to her, she calmed down and went on with her performance.

A. encouragingly

B. amazingly

C. interestingly

D. astonishingly

答案：

(答案→)A. encouragingly

B. amazingly

C. interestingly

D. astonishingly

解析：考查副词辨析。A鼓励地 B、D 令人惊讶地 C有趣地根据意思，看到老师对他鼓励地点点头，他平静了下来继续表演。