I will visit my grandmother if she { } free tomorrowA isB is notCwill isDwill not

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Iwillvisitmygrandmotherifshe{}freetomorrowAisBisnotCwillisDwillnotIwillvisitmygrandmotherifshe{}free

I will visit my grandmother if she { } free tomorrowA isB is notCwill isDwill not
I will visit my grandmother if she { } free tomorrow
A is
B is not
Cwill is
Dwill not

I will visit my grandmother if she { } free tomorrowA isB is notCwill isDwill not
选A,
BD语义不符,
C用将来式不对,因为在这种情况下主句将来式条件从句应为一般现在式

选A

这句是很明显的主将从现的句式
主将从现是指在时间状语从句和条件状语从句和让步状语从句中,如果主句是一般将来时,从句用一般现在时替代一般将来时。
所以这题应该选择A,不管它后面什么时态都用一般现在时

选A if引导的条件状语从句,如果主句是一般将来时则从句是一般现在时

A,if引导条件状语重句,主句用将来时,重句用一般现在时。所以选A。