His teacher told him that since his parents were working abroad, either his grandparents or one of his uncles allowed to e to the parents’ meeting .
A. was
B. were
C. are
D. is
网友回答
(答案→)A. was
B. were
C. are
D. is
解析：句意：他的老师告诉他因为他的父母都在海外工作，他的祖父母或他的一位叔叔被允许参加父母家长会。either …or引导主语时，谓语采取就近的原则。one of his uncles靠近谓语的位置，所以用单三形式，又因为前面用了told，说明是一般过去时，时态前后要一致。所以用was，故选A。
考点: 考查主谓一致和时态的用法。