A:Where is hid pencil box

This is a pencil box.对a pencil box 提问 This is a pencil box.(对” a pencil box”提问 ) That is a red pencil box.() where is my pencil-box?(改为复数形式） Where is my pencil-box （改为复数形式） 单句改错where is your a pencil? A pen is on a pencil-box.【改为同义句】 That is a pencil box 这句话哪儿错了 It is a red pencil box.变成复数形式. That is my a pencil-box.改病句 Is it a pencil-box?改为肯定回答. This is a pencil box 改为一般疑问句