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?

【考点】复数名词,系动词,一般疑问句,选择疑问句,疑问词组

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