问题
选择题
Computer cannot remember who _______; it simply does what _______.
A．has used it; it is told
B．will used it; it was told
C．uses it; it has told
D．has used it; it told
答案
答案：A
第一个空上可用现在完成时或一般现在时;第二个空上则必须用两者的被动式。