句型转换：请根据要求做题。每空一词。

1.This book is eight yuan.(对划线部分提问)

_________ _________ is this book?

2.That hat is very nice.(改为复数句)

_________ hats _________ very nice.

3. Jack eats hamburgers for dinner.(改为否定句)

Jack _________ _________ hamburgers for dinner.

4. My dictionaries are under the desk.(改为一般疑问句)

_________ _________ dictionaries under the desk?

5. — Is this Jim's father? (作肯定回答)

    — Yes,_________ _________.