问题
选择题
Every possible means ________, but the teacher as well as the students ________ found a solution to the problem yet.
A．has been tried; hasn’t
B．has tried; haven’t
C．have tried; haven’t
D．have been tried; hasn’t
答案
答案：A
考查主谓一致。means单复同形，与every修饰，谓语动词用单数；as well as连接两个主语，谓语动词与前一个主语保持一致，故选A。