according to the instructions, the robot can behave like a human being with average IQ.
A. When to operate
B. When operating
C. When to be operated
D. When operated
网友回答
A. When to operate
B. When operating
C. When to be operated
(答案→)D. When operated
解析：考查非谓语动词。句中operate与逻辑主语为the robot为被动关系，故用过去分词。句意：当根据说明操作，机器人行为可以像普通智商的人类。故D正确。