句型转换(按要求改写下列句子)。

1. They are happy to see each other. (改为感叹句)

    ______ ______ they are to see each other!

2. The exam begins at nine. (改为一般疑问句)

    ______ the exam ______ at nine?

3. He was playing basketball at four yesterday afternoon. (就划线部分提问) 

    What ______ he ______ at four yesterday afternoon?

4. He had nothing for breakfast. (改为反意疑问句)

    He had nothing for breakfast ______ ______?

5. She doesn't think I can surf on the Internet. (改为反意疑问句)

    She doesn't think I can surf on the Internet, ______ ______?

6. He's put the tree in the hole? (改为一般疑问句)

    ______ he ______ the tree in the hole?

7. How useful the book is! (改为陈述句)

    It is ______ ______ useful book.

8. The population of Australia is about 19,500,000. (就划线部分提问)

     ______ ______ population of Australia?

9. The meeting will start in ten minutes. (就划线部分提问)

     ______ ______ will the meeting start?

10. Don't tell him to come to my office. (改为肯定的祈使句)

      ______ ______ to come to my office.