Peter sat on the train seat with his eyes on the fields outside the window.A. fixingB. f

问题补充：

Peter sat on the train seat, with his eyes on the fields outside the window.

A. fixing

B. fixed

C. to fix

D. having fixed

答案：

A. fixing

(答案→)B. fixed

C. to fix

D. having fixed

解析：句意：Peter坐在火车座位上，他的眼睛盯着窗外的田地。动作fix与其逻辑主语his eyes是被动关系，故用过去分词，选B。