They had their shabby house      and sold it for a big profit.

A．brought up

B．taken up

C．put up

D．done up

驾驶机动车在铁路道口看到这种信号灯时怎样行驶？（）

A．边观察边缓慢通过

B．不换挡加速通过

C．在火车到来前通过

D．不得越过停止线