Either your parents or your grandfather __to attend the meeting tomorrow.
问题描述：
Either your parents or your grandfather __to attend the meeting tomorrow.
A is
B are
C are going
D have
答
选 A
be to do 将要去做某事
either ...or...后面的动词,要和or后面的名词一致.“就近原则”
翻译下,
你爸妈或是你爷爷明天将会参加会议.