我们班有二十个学生，每个学生都有一本英语书。

There are twenty students in our class, and ___each student has an English book.

请给每个孩子一块饼干。

Please give ___each child a cookie.

我给我的三个朋友都寄了一张明信片。

I sent a postcard to ___each of my three friends.