Choose the best answer for the following sentence:
In the last hundred years, traveling _____ much easier and more comfortable. 
A. is becoming                     
B. has become
C. became                    
D. becomes

Choose the best answer for the following sentence:
There was a traffic jam on my way to work this morning as the main road was under ______________ . 
A. construction                    
B. construct
C. constructing                   
D. constructive

Choose the best answer for the following sentence:
Hummock grasses _______________ in loose sand on the crest.
A. grow 
B. raise
C. plant 
D. increase

Choose the best answer for the following sentence:
For several years, his ambition _______________ to a pilot.
A. is           
B. has been                  
C. was                 
D. had been

Choose the best answer for the following sentence:
In general, coal was ______________ source of electrical power in both years, although nuclear power grew _______________ importance.
A. the more important - at
B. the most important - in
C. more important - on
D. a most important - in

Choose the best answer for the following sentence:
This wine __________ in the cellar for 15 years. When we take it out and open it, it will taste beautiful!
A. was            
B. has been                
C. have been                    
D. is

Choose the best answer for the following sentence:
They are conducting a campaign to ___________ the public about the dangers of smoking. 
A. train               
B. educate                 
C. teach               
D. prepare

Choose the best answer for the following sentence:
He was admirably voted the most ___________ production manager of the year. 
A. adequate                
B. efficient                    
C. inept                  
D. feeble

Choose the best answer for the following sentence:
Since their appearance, books are a previous _____________ of knowledge and pleasure. 
A. source                    
B. pile                     
C. amount                     
D. sum

Choose the best answer for the following sentence:
 Under federal law, it is illegal to ______________ women.
 
A. discriminate between
B. differentiate from
C. differentiate against
D. discriminate against