将下列句子改为选择疑问句。

1. The boy is tall. The boy is short.

    _____ the boy tall _____ _____?

2. He knows Mr. Wang. He knows Mr. Zhang.  

    _____ he know _____ _____ _____ Mr. Zhang?

3. He is old .He is young..  

    _____ he _____ _____ _____?

4. This is a cell phone. This is a telephone.

    _____ this a cell phone _____ _____ _____?

5. Is this a doctor? Is this a nurse?  

    _____ this _____ _____ or _____ _____?

《唐六典》记：“工巧业作之子弟，一入工匠后，不得别入诸色”；《新唐书》载：“细镂之工，教以四年；车路、乐器之工，三年；平漫刀矟(长矛)之工，二年……教作者传家技。”这表明唐代工匠(　　)①频繁更换工种 ②长期在官府作坊干活

③职业是世袭的 ④是临时工人

A．①②

B．②③

C．①③

D．③④