She was staring out over the lake， in thought.
A. lost
B. losing
C. to lose
D. to having lost
网友回答
(答案→)A. lost
B. losing
C. to lose
D. to having lost
解析：lose 有个习惯用法，即用于 lose oneself in，表示“沉湎于”“迷上”“专心地”等，且通常用于被动结构，如：She stood there， lost in thought. 她站在那儿沉思。She lost herself in reading. ／ She was lost in reading. 她埋头读书。