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

网友回答

A. sitting; fixing
B. to sit; fixed
C. seating; fixing
(答案→)D. seated; fixed
解析：句意：在阅览室内，我们发现坐在一张桌子旁，集中精力看一本书。be seated 就坐=sitting，fix one’s attention on集中精力于。 故选D。
考点: 考查非谓语动词的用法。