in thought he sat at the edge of the bed with his eyes on the letter in his hand.A. Lo

问题补充：

in thought, he sat at the edge of the bed, with his eyes on the letter in his hand.

A. Lost; fixing

B. Losing; fixed

C. Lost; fixed

D. Losing; fixing

答案：

A. Lost; fixing

B. Losing; fixed

(答案→)C. Lost; fixed

D. Losing; fixing

解析：考查分词用法。Be lost in thought陷入沉思；第二空的eyes与fix构成被动关系，使用过去分词。