Choose the best answer for the following sentence:
I think I _____________ my door key. I can’t find it anywhere.
A. lost 
B. have lost
C. am losing
D. will lose

Choose the best answer for the following sentence:
Viet Nam’s successful hosting of the 22nd SEA Games is considered a/an ____________ example for other countries to follow, particularly in honesty, con-sistence and organizing method. 
A. festival                     
B. peaceful                    
C. energetic                    
D. outstanding

Choose the best answer for the following sentence:
“How’s your homework coming?”
“I haven’t gotten very far _________ it.” 
A. about               
B. on                  
C. for 
D. of

Choose the best answer for the following sentence:
I wasn’t thirsty because I __________ some milk.
A. just drank
B. have just drunk
C. had just drunk
D. was just drinking

Choose the best answer for the following sentence:
____________ struck the family when their son was hit by a car and killed. 
A. Misadventure                  
B. Catastrophe
C. Tragedy                  
D. Calamity

Choose the best answer for the following sentence:
Peter ___________ apologize for his bad behaviour yesterday. 
A. have to                
B. had to                
C. may                   
D. is to

Choose the best answer for the following sentence:
A ___________ studies living things and works with plants and animals.
A. biology                   
B. biological              
C. biography                   
D. biologist

Choose the best answer for the following sentence:
I ______________  to the same barber since last year. 
A. am going         
B. have been going 
C. go               
D. had going

Choose the best answer for the following sentence:
He looked __________ when he heard the news.
A.  think
B. thought
C. thoughtful
D. thinking

Choose the best answer for the following sentence:
It's the best book __________ I've ever read.
A. which
B. who
C. when
D. that