问题补充:
When he came to, he found himself on a chair, with his hands back.
A. to sit; tying
B. sitting; tying
C. seating; tied
D. seated; tied
答案:
A. to sit; tying
B. sitting; tying
C. seating; tied
(答案→)D. seated; tied
解析:由seat的用法(be seated)可知第一空应用seated作宾语补足语;with his hands tied back为with的复合结构在句中作伴随状语。