按要求写一写，每空一词。

1. This man is a teacher. (改为复数形式)

    These ____________ ____________ teachers.

2. She is twelve years old. (对画线部分提问)

    ____________ ____________ is she?

3. Is it cold today? (用hot改为选择疑问句)

    Is it ____________ ____________ ____________ today?

4. I always walk to school. (改为一般疑问句)

    ____________ ____________ ____________ walk to school?