A puter cannot remember who_________；it simply does what __________.
A.will use it; it was told
B.uses it; it has told
C.has used it; it was told
D.has used it; it told
网友回答
C解析前一个分句中连接代词who引导一个宾语从句，用现在完成时表示说话以前所做的动作；后一个分句中连接代词what引导一个宾语从句，该从句表示的是说话以前某时所做的具体动作，应用一般过去时.主语是谓语动词动作的承受者应用被动语态.