When the earthquake, a destructive natural disaster, happened, ninety-nine coal miners were trapped

in the coal mine _____the ruins, waiting _____.[ ]

A. in; to be rescued 

B. under; for being rescued

C. in; to rescue  

D. under; to be rescued

（）是人们在社会交往中以建立和谐关系为目的的各种约定俗成的行为准则与规范。

A.礼貌

B.礼节

C.礼仪

D.仪式