it _____be Meimei's or Linda's.they both have long hair.如题,填must 还是might?为什么?

it _____be Meimei's or Linda's.they both have long hair.如题,填must 还是might?为什么?
it _____be Meimei's or Linda's.they both have long hair.
如题,填must 还是might?为什么?

it _____be Meimei's or Linda's.they both have long hair.如题,填must 还是might?为什么?
It must be Meimei's or Linda's.They both have long hair.不可以用might因为用might有一些不肯定的意味,用must就是非常肯定而且也是很强的说明白“他们两个人都是有长头发”.