Find a mistake in the four underlined parts of the sentence and correct it:
When I kept to get unwanted calls, I had my phone number changed.
A. When I kept
B. to get unwanted calls
C. I had my phone number
D. changed

Choose the best answer for the following sentence:
Don’t forget to ____________ in touch while you’re away.
A. put
B. keep
C. make
D. hold

Find a mistake in the four underlined parts of the sentence and correct it:
Population density in the Red River Delta is by now more densely populated region in
Vietnam with 1,136 people per square kilometer.
A. more
B. densely populated
C. with 1,136 people
D. per square kilometer

Choose the word that has the underlined part pronounced differently from the rest: 
design                  sign                   singular                    mausoleum
A. design                  
B. sign                   
C. singular                    
D. mausoleum

Choose a word that has different stress pattern:
nervous             wonsder              belong                quiet
A. nervous            
B.  wonsder              
C. belong                
D. quiet

Choose the best answer for the following sentence:
In my opinion, there are five most important _________ which are necessary for true friendship to exist. 
A. quantities  
B.  qualities   
C. characteristics   
D. grades

Choose a word that has different stress pattern:
improvement                engraving              maintenance              spectacular
A. improvement                
B. engraving              
C. maintenance              
D. spectacular

Choose a word that has different stress pattern:
admire            bygone             common             landscape
A. admire            
B. bygone             
C. common             
D. landscape

Choose a word that has different stress pattern:
actually            accomplish              equipment              gigantic
A. actually            
B. accomplish              
C. equipment              
D. gigantic

Choose a word that has different stress pattern:
mineral             energy                 generate                introduce
A. mineral             
B. energy                
C.  generate               
D.  introduce