_______ our food ________,we had to walk to a village for help.

A．Since;runs out

B．Because;run out

C．With;running out

D．For;running out

《综合交通网中长期发展规划》提出，南北沿海运输大通道，以( )枢纽机场为节点，与国际航线网络相衔接。

A．北京和上海
B．北京和广州
C．上海和广州
D．深圳和广州