nobody but betty and mary _____late for class yesterday

问题描述:

nobody but betty and mary _____late for class yesterday

was,
but Betty and Mary 是介词引导的后置定语部分,不是主语,主语是句首的nobody

was

was
当主语有with,together with,like,except,but,no less than,as well as 等词组成的短语时,谓语动词与前面的主语部分一致,即就远原则