问题补充：
On our arrival, we found Tom at the desk with his hand to the distance.
A. seated, pointing
B. sitting, pointing
C. seating, pointed
D. seated, pointed
答案：
A. seated, pointing
B. sitting, pointing
C. seating, pointed
(答案→)D. seated, pointed
解析：句意：我们一到就发现汤姆坐在桌子旁边手指向远处。Sb be seated某人坐着；find sb done，sb与do之间是被动关系。所以这里find Tom seated;find sb doing发现某人做某事；find Tom sitting;with sth done，sth与do之间是被动关系。因为point his hands to…手指向；故这里应该是with sth done的结构，故选D。
