_____ according to the instructions, the robot can behave like a human being with average IQ.
A．When to operateB．When operating
C．When to be operatedD．When operated
D

試題分析：考查非謂語(yǔ)動(dòng)詞。句中operate與邏輯主語(yǔ)為the robot為被動(dòng)關(guān)系，故用過去分詞。句意：當(dāng)根據(jù)說明操作，機(jī)器人行為可以像普通智商的人類。故D正確。
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