yo-yo 复数急!

yo-yo 复数急! yo-yo的复数是什么 yo yo-yo的复数和thief的复数 yo—yo 变复数加是还是es 英语题（名词复数）yo-yopaperphotosheep Yo Yo Castle Castle 小学英语卷：yo-yo mango的复数是?yoyo的复数是加s?es? 英语单词的复数形式strawberry.thief.yo-yo.paper.juice.rice.tea 写出下列名词的复数怎么写?this( )that( )yo-yo( )strawberry( )sandwich( )paper( )diary( )man( ) 写出下列词的复数（him,her,photo,diary,dress,sheep,box,thief,yo-yo） yo yo 复数到底加什么啊!给个明确点的吧 跪求yo-yo的复数 请有100%把握的高手回答 so yo YO KO Yo doctor yo no play with my yo-yo.