As a boss, he expected total loyalty and dedication from his employees.
A. demanding
B. demanded
C. demand
D. having demanded
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(答案→)A. demanding
B. demanded
C. demand
D. having demanded
解析：demanding [adj.]“（指人）苛求的”。句意为“他是个苛刻的老板，要求手下的人对他中心耿耿，鞠躬尽瘁。”