奇怪，，prep1-37，注解中没有提到的问题

37.
            (26417-!-item-!-188;#058&002629)

One report concludes that many schools do not have, or likely to have, enough computers to use them effectively.

(A) or

(B) nor

(C) or are

(D) nor are they

(E) nor are not

答案是d，我的问题是，d中的they明显是指代schools，但是后面的them应该是指代computers，那岂不是指代不一了吗？？