Mark the letter A, B, C or D on your answer sheet to indicate the word that differs from the other three in the position ofprimary stress in each of the following questions.

A. technology

B. audience

C. territory

D. commerce

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

A. accountant 

B. amount

C. founding 

D. country

Mỗi biểu thức sau có phải là số chính phương không?

a) 3 3 . 4 ;

b)  5 2 + 12 2 .