[解析]
(1)at around o'clock.根据第二段"At 12 ,I heard a noise.故答案为:at 12 .
(2)bed sheets.根据第三段At ,they to the with bed .But a few later boy from fourth .The didn't time get .可知他们没有时间去准备床单.故答案为:bed .
(3)their arms.根据第三段so tried catch boy their .可知他们用胳膊抓住了孩子 arms.
(4)on the floor.根据最后一段"The lives the floor," a officer .可知这个孩子住在六楼 the floor.
(5)doing housework.根据最后一段 was housework didn't much to boy.故答案为:doing .