The plural morpheme "-s" is pron

The plural morpheme "-s" is pronounced as/z/in the following words EXCEPT（ ）
A、beds
B、bags
C、cheats
D、bottles
【正确答案】：C
【题目解析】：浊辅音结尾+s，读作/z/；清辅音结尾+s，读作/s/。复数语素“-s”在以下单词中读为/z/，如：beds /bedz/，bags/bægz/，bottles/'bɒt(ə)lz/。