Một hình vuông có chu vi  20 m, diện tích hình vuông đo bằng bao nhiêu  m 2 ? 

A. 15 m 2

B. 20 m 2

C. 25 m 2

D. 400 m 2

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 of primary stress in each of the following questions.

A. adventure

B. attendance

C. opponent

D. penalty

Choose the word whose underlined part has a different pronunciation from the others in each group

A. kitchen

B. when

C. mess

D. debt