Choose the best answer for the following sentence:
Mary introduced me to her classmates, _________________ .
A. of whom some are from the south
B.  some of them are from the south 
C. whose some are from the south
D. some of whom are from the south

Choose the best answer for the following sentence:
Don’t worry ________ it; I promise it won’t be ____________ problem.
A. for - the
B. for - a
C.  about - the 
D. about - a

Choose the best answer for the following sentence:
They took away his freedom and broke his ____________. 
A. step                   
B. spirit                   
C. sweat                   
D. cover

Choose the best answer for the following sentence:
In 1955, ______________________ Hawaii was admitted to the Union as the 50th State. 
A. the             
B. an                   
C. a                  
D. no article

Choose the best answer for the following sentence:
"Can you tell me where a hardware store is?”
“I’m sorry. I’m not familiar ___________ this city.'' 
A. with     
B. to 
C. about  
D. for

Choose the best answer for the following sentence:
The town’s volunteer ________________ has received a lot of donations from several
sources over the past years.
 
A. organize                   
B.  organization           
C. organizational   
D. organizable

Choose the best answer for the following sentence:
The evidence was only circumstantial. ______________, he was convicted and spent ten years in prison for a crime that he perhaps did not commit. 
A. Even that               
B. Even so
C. Even though
D. Even if

Choose the best answer for the following sentence:
Stay away from him when he is ___________ with fury. He is not himself and loses his control easily. 
A. apoplexy                          
B. apoplectical                        
C. apoplectic                          
D. apoplectically

Choose the best answer for the following sentence:
They've decided that the memorandum should be sent only to those ____________. 
A. respective                   
B. relative              
C. worried              
D. concerned

Tầng ôzôn mỏng dần và lỗ thủng tầng  ôzôn ngày càng rộng là do tác động của loại khí nào?
A. CO2.    
B. CH4.
C. CFCs.
D. H2S.