Modun của số phức  $z={{(-1+i.\sqrt{3})}^{6}}$ bằng
A. $8.$
B. $16.$ 
C. $32.$
D. $64.$

Tập hợp các điểm biểu diễn các số phức z thỏa mãn | z +1 – i | ≤ 1 là
A. Hình tròntâm I(-1;1), bán kính R = 1.
B. Hình tròn tâm I(-1;-1), bán kính R = 1.
C. Hình tròntâm I(1;1), bán kính R = 1.
D. Hình tròntâm I(1;-1), bán kính R = 1.

Choose the word that has the underlined part pronounced differently from the rest:  
worry                       cottage                       love                    some 
A. worry         
B.  cottage        
C.  love        
D. some

Choose a word that has different stress pattern:
final                    football                       around                      famous
A. final                    
B. football                       
C. around                      
D. famous

Choose a word that has different stress pattern:
follow                        complete                            release                         increase
A. follow                        
B. complete                            
C. release                         
D. increase

Choose the best answer for the following sentence:
She is _____________ a novelist.
A. more a poet than
B. more of a poet than
C. a poet more than
D. a poet of more than

Choose the best answer for the following sentence:
The USA is one of the _______________ countries in the world. There are a lot of people of many different nationalities and cultures
A. economic
B. extensive
C. multiracial
D. undeveloped

Choose the word that has the underlined part pronounced differently from the rest:
social                       centre                       city                       dance
A. social                       
B. centre                       
C. city                       
D. dance

Choose a word that has different stress pattern:
develop                     different                            gallery                      visitor
A. develop                     
B. different                            
C. gallery                      
D. visitor

Choose the best answer for the following sentence:
The state is at least ___________ England.
A. twice as big as
B. as twice big as
C. as two times big as               
D. as big as twice