题目内容：

__either your parents or your elder brother to blame for your being late?
1.is
2.are
why?

优质解答

答案应该是are,这个题目考的是临近原则,谓语动词和最靠近谓语的名词保持一致,因此用are是由your parents决定的.这个句子如果变成肯定句的话,就要变成：Either your parents or your elder brother [is] to blame for your being late.