At last she found her pet dog.A. lostB. loseC. losingD. loses

问题补充：

At last, she found her pet dog.

A. lost

B. lose

C. losing

D. loses

答案：

A. lost

B. lose

(答案→)C. losing

D. loses

解析：此题答案错误，考查短语：find sb doing sth表示看到某人正在做某事，句意：最后，她发现她在丢掉宠物。所以选C。