问题
选择题
_____ 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
答案
答案：D
题目分析：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。