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

问题补充：

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

A. sitting; fixing

B. sat; fixed

C. seating; fixing

D. seated; fixed

答案：

A. sitting; fixing

B. sat; fixed

C. seating; fixing

(答案→)D. seated; fixed

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