likes works starts students says friends newspaper lessons enjoys apples s的音标

题目

likes works starts students says friends newspaper lessons enjoys apples s的音标
/s/ /z/ /iz/ 把上面几个归个类.还有以下几个：walls walks boats jeeps knives bikes likes lives does dogs listens lessons photos birds oranges buses
凡半小时内回答者加悬赏。

答案

/s/：knives、works、starts,students、apples、walks、boats、jeeps、does
/z/：says、enjoys、photos、likes、friends、lessons、walls、bikes、dogs
/iz/：enjoys、listens、oranges、buses