题目内容：

根据括号内的要求完成下列各题，每空一词（含缩略形式）。

1.These books are his. (改为一般疑问句)

________ these books ________?

2.This is my pencil box. (改为否定句)

This ________ ________ my pencil box.

3.Is this your eraser? (作否定回答)

________, it ________.

4.That is her pen. (改为同义句)

That pen ________ ________.

5.Those are Helen’s rulers. (对划线部分提问)

________ ________ those?