单选题 Either you or I ______ wrong on this matter. So we don't have to quarrel with each other. It is useless.

【正确答案】 C

【答案解析】[解析] either...or所连接的名词作主语，后面的谓语动词与其相邻的名词或代词一致，所以选C。常见的搭配还有“neither...nor...，whether...or...，not only...but also...”。