Do let my mother know all the truth. She appears __________everything.     [ ]

A. to tell                      

B. to be told    

C. to be telling                

D. to have been told

吃饭时看到有人突然不能说话，面色发青，应该怎么急救？（）

A、拍背

B、在其身后压挤上腹部

C、让他赶紧喝点醋

D、让他吃大块馒头