Which of the following is NOT mentioned as a way to measure the time? ( )A. Counting the b

Which of the following is NOT mentioned as a way to measure the time? ( )

A． Counting the beating of one's own heart．

B． Making use of candles, sand and water．

C． Observing shadows casf by the sun．

D． Keeping slaves busy day and night．

答 案：D
D[解析]文章的第三、四段是介绍古代掌握时间的方法，其中ABC项都提到过，只 有D选项说让奴隶们一天忙到晚，没有提到，而且不符合常识。所以答案选D。