Choose the word that has main stress placed differently from the others. 
Câu 1: 
         
         A. experience
             
         
         B. cosmetics 
         
         C. economics 
         
         D. photography 
Câu 2: 
         
         A. appropriate             
         
         B. miraculous
         
         C. intimacy 
         
         D. solidify
Câu 3: 
         
         A.  conventional            
         
         B. preferential 
         
         C. calculation
         
         D. apprehension
A.
B.
C.
D.