where is my pen和where are my pen有什么区别?

where is my pen和where are my pen有什么区别? "Where is my pen?" where --- my CD and my pen?用is还是are?where --- my CD and pen? Where is my pen and pencil?还是Where are my pen and pencil? where ()my pen and my pencil?1,are 2,is Where is my pen?It's_________(那边) Where is my pen?I_____it.（b） my(dear)!where is my pen?为什么用dear Where is还是are my pen and my pencil box?有理 Where are my pen and pencil?'' "______in your desk.'' （where's my 某某）和（where are my 某某）有什么区别? Where is my house和Where is my home有什么区别