1.
A : ?
   
Á¤´ä : Do you know Sarah¡¯s telephone number?
 
   
   
2.
A : .
   
Á¤´ä : I¡¯m afraid I don¡¯t know.
 
   
   
¼ö°íÇϼ̽À´Ï´Ù.