my pencil-case

my pencil-case my pencil is ____ my pencil case How a___ my pencil case急 blue is pencil case my 组成一句话 This __ (be not)my pencil case Where( )the erasers?( )in my pencil case And where's my pencil-case? My pen is in my pencil case.(对in my pencil case提问) There is a pen in my pencil case改为I () a pen in my pencil case How about my pencil case and my baseball什么意思 How about my pencil case and my baseball. How about my pencil case ------ my baseball?-------填什么 My pen is in my pencil case.(改为一般疑问句) Hwo about my pencil case and my baseball? is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil(is,too,that,pencil,my,and) (is,case,yellow,this,a,pencil)连词成句 This is my pencil case改为复数形式 That is my pencil case（改为一般疑问句） my pen is in pencil case 哪里错了?