下列选项中，不属于无线局域网应用的是( )。

A．作为传统局域网的扩充

B．建筑物之间的互联

C．VLAN

D．特殊网络Ad hoc

It was __________________ back home from work.

A．not until midnight did he go

B．until midnight that he didn’t go

C．not until midnight that he went

D．until midnight when he didn’t go