The old woman _____ I talked just now is my grandma

選A。這是壹個定語從句，首先，the old woman是先行詞，所以關系代詞應該用that/who/whom，其次，關系代詞需在後面的定語從句中充當成分，talk是不及物動詞，所以原句應該是：The old woman that/who/whom I talked to just now is my grandma.而選項中to 放在了關系代詞的前面，所以只能選A 。