is comprised of
is made of
contain
is composed of
comprise＂包括”，本身不用被动语态，相当于 be composed of； be made of“由…制成”； contain＇“包含”，此处正确应用第三人称单数； be composed of＂由…组成”。句意:我们所居住的单元房只有三个房间。故选D。
