How about my eraser ___ my pencil case? They are in your bac

How about my eraser ___ my pencil case? They are in your bac my eraser is in the pencil case改为疑问句 My eraser am in the pencil case.哪里错? My eraser is in the pencil case. 对in the pencil case.进行提问 to My eraser is in the pencil case.对in the pencil case.进行提问 tom My eraser is in the pencil case.对in the pencil case.进行提问 your,your,eraser,pencil case,put,in How about my pencil case ------ my baseball?-------填什么 How about my pencil case and my baseball. How about my pencil case and my baseball什么意思 How a___ my pencil case How () pencils are there in your pencil case?