Choose the best answer for the following sentence:
Most parents have total confidence ___________  the school.
 
A. in                           
B. with               
C. for                    
D. about

Choose the best answer for the following sentence:
I didn't know how to answer his question. There was a ____________ in our conversation.
A. pause                    
B. break                   
C. quiet                 
D. silence

Choose the best answer for the following sentence:
Her father is not only the town mayor, he runs ____________________, too. 
A. a business                    
B. a piece of business 
C. business                     
D. some business

Choose the best answer for the following sentence:
It was three o'clock. We ____________ to hurry up because we _____________.
A. were told - were being waited                    
B. had been told - were waited
C. were told - were waiting                
D. told - were being waited

Choose the best answer for the following sentence:
The news of war _______________ and the world.
 
A. was shocked the nation                          
B. was shocked by the nation
C. shocked the nation                         
D. shocked by the nation

Choose the best answer for the following sentence:
It _____________ possible for me to continue playing tennis since I ____________ school.
 
A. wasn't - had left             
B. isn't - left
C. isn't - has left
D. hasn't been - left

Choose the best answer for the following sentence:
“Can I help you?”
“Yes, I’m interested ___________ buying a pair of boots.” 
A. in 
B. on  
C. for  
D. by

Choose the best answer for the following sentence:
The fiscal budget, totaling 83,061.3 billion yen, which is designed to boost regional economies and narrow gaps between major cities and the countryside, will be ____________ in time for the start of the new fiscal year in Japan on Tuesday.  
A. failed                 
B. enacted                 
C. vetoed                  
D. decoded

Đạo hàm của hàm số y=-2x7+x là 
A. y'=-14x6+2x.
B. y'=-14x6+2x.
C. y'=-14x6+12x.
D. Một kết quả khác.

Hàm số y=12cotx2 có đạo hàm là:
A. y'=-xsin2x2.
B. y'=-x2sinx2.
C. y'=-xsinx2.
D. y'=-xsin2x2.