Many people in Haiti died from the earthquake because they didn’t have       to immediate rescue.  [ ]

A. access            

B. admission  

C. approach          

D. attention

外墙的墙脚通常称为______。它不但受到______的侵袭，而且______和外界机械作用力也对它产生危害作用，所以除了要求设置墙身______外，还应特别加强勒脚的坚固耐久性。