As Polly observed the passengers on the train she that she was being watched by a tall ma

问题补充：

As Polly observed the passengers on the train, she that she was being watched by a tall man in a dark coat.

A. feared

B. sensed

C. sighted

D. sniffed

答案：

A. feared

(答案→)B. sensed

C. sighted

D. sniffed

解析：考查动词辨析：A. feared害怕B. sensed感觉C. sighted看见D. sniffed嗅，闻，句意：当Polly观察火车上的人，他感觉到她被一个穿着深色外套的人注视着。选B。