根据答语写出问句。

1.—___                         _?

    She's ten years old.

2.—__                         __?

    — His birthday is November eleventh.

3.—___                         _?

    —She is fine.

4.—__                         __?

    —Your football is under the chair.

5.—_                         ___?

   —They are $20.

通风管道必须穿过防火墙和非燃烧体楼板等防火分隔物时，( )。

A．在穿过处设防火阀

B．在穿过防火墙两侧各2m范围内的风管保温材料应采用非燃烧材料

C．穿过处的空隙应用非燃烧材料填塞

D．上述三项都是必须的