学校计划将旁边的空地并入校园，以扩建操场。

The school plans to ___annex the adjacent vacant lot to expand the playground.

该国试图通过武力吞并那个岛屿以扩大领土。

The country tried to ___annex the island by force to expand its territory.

学校新建了一座附属楼作为图书馆。

The school constructed a new ___annex to serve as a library.