it的形容詞性物主代詞是什么詞

　　The school is the first of its kind in Britain.

　　這是英國同類學校中最早的一所。

　　Water will always find its own level.

　　水總會自行流平。

　　It is the first car of its type to have this design feature.

　　這是同類型汽車中首部具備這種設計特點的。

　　This technology is still in its early stages.

　　這項技術還處于其早期開發狀態。

　　The book is an analysis of poverty and its causes.

　　這本書分析了貧困及其原因。