In the reading room we found her at the desk with her attention on a book.A. seated; fix

问题补充：

In the reading room, we found her at the desk, with her attention on a book.

A. seated; fixing

B. to sit; fixed

C. seated; fixed

D. seating; fixing

答案：

A. seated; fixing

B. to sit; fixed

(答案→)C. seated; fixed

D. seating; fixing

解析：考查非谓语动词。seated就座的，表示坐着的状态，相当于sitting，find sb +过去分词/现在分词/介词短语等作宾补，意为“发现某人......”，排除B、D；attention与fix是动宾关系，应该使用过去分词表被动，排除A，故选C。