题目

(1)  As Polly o____________(86) the passengers on the train, she s______________(87) that she was being watched by a tall man in a dark coat. At last the train arrived at Green Park station. While the rest of the passengers were getting out, she g______________(88) at the faces around her. The tall man was nowhere to be seen. 答案：86. observed          87. sensed       88. glanced    

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