肺炎链球菌肺炎胸痛的原因是（）

A.炎症累及肋间神经所致

B.病变刺激肺泡所致

C.病变累及胸膜所致

D.并发脓胸所致

E.病变累及血管膜所致

With food and gunpowder       short, the soldiers are suffering from hunger and danger of being attacked by the enemies at any time.

A．to run

B．to be run

C．run

D．running