occupy的名詞形式怎么寫

　　例句：

　　How much memory does the program occupy?

　　這個程序占用多少內存？

　　Even small aircraft occupy a lot of space.

　　即便小飛機也占很多空間。

　　The bed seemed to occupy most of the room.

　　床似乎占去了大半個屋子。