----day is on june first and ---- day is on september tenth.

问题描述:

----day is on june first and ---- day is on september tenth.
a.children's,teacher's b.children's,teachers'
c.children's,teacher' d.children' ,teachrs' 那个好像没大写.

B
因为儿童的复数是children,直接在后面加's
老师的复数是teachers,直接在后面加's
要强调的是,不是一个孩子的节日,也不是一个老师的节日,所以,先要变成负数,然后再加's,表示某某人的