英语问题Now with many single-parent families or homes ____ both

making 结果状语
先行词是家庭,在这些家庭里,所以用where
each,every这两个词都有“每个”的意义.
each强调各别、各个,而every 强调全部、都
He can get up for about two hours each day.
他每天可以起床活动大约两个小时.
He gave each boy an apple.
他给每个孩子一个苹果.
Nearly everybody enters for 'The Nicest Garden Competition' each year,but Joe wins everytime.
几乎每年每人都报名参加“最佳花园赛”,但每次都是乔获胜.
From each according to his ability,to each according to his work.
各尽所能,按劳分配.
The sun shines every day.
每天都是阳光灿烂.
He is only forty-one years old,and he has already been to nearly every country.
他只有41岁,而他已经几乎到过一切国家.

whose后面加名词。所以这里不用。each和every都是每一个的意思，方便的记法是each重点是“每一个”中的“一”，every表示的是“每”。在翻译时重点体会就知道了。

这句话中families or homes是先行词， 所以用where。
另each强调个体。every强调整体