Where are my CDs?CD为什么要用复数?

Where are my CDs?CD为什么要用复数? Where are the CDs? 2．---- Where are my ________( CD) Where are the CDs?该怎么回答? —________?—They're on the sofa.A.Are those your CDs B.Where are your CDsC.Where is your CD D.Are your CDs on the sofa there are ----- CDs on my bookcase. where --- my CD and my pen?用is还是are?where --- my CD and pen?用is还是are? My CDs are（ in my schoolbag）对划线部分提问,此处划线部分为打括号部分 this is my backpack复数,they are my aunts单数,those are my CDs划线提问my CDs. my CDs are in the drawer of the bookcase. There are some CDs in my schoolbag.(同义句) There are some CDs in my schoolbag.同义句 where are my where are my flowers? Where are my Where are the country CDs?They are ___(straight/behind)the pop music 英语选择,说明理由Where are the country CDs?They are (straight/behind) the pop music. ARE THE GAMES WHERE THE AND CDS COMPUTER连词成句father's is bed the your watch undera need dictionary and i book chinese aher floor baseball the and my on are hat