我们家的后院和学校操场相邻。

Our backyard ___borders the school playground.

这条河流形成了两国的自然边界。

The river serves as the natural ___border between the two countries.

这条小河环绕着整个村庄。

A small river ___borders the entire village.

花园的边界种满了玫瑰花。

The ___borders of the garden are planted with roses.