Có 15 học sinh lớp A trong đó có Khánh và 10 học sinh lớp B trong đó có Oanh. Hỏi có bao nhiêu cách lập ra một đội tình nguyện có 7 học sinh trong đó có 4 học sinh lớp A, 3 học sinh lớp B và trong đó chỉ có một trong hai em Khánh hoặc Oanh.
A. C143.C93
B. C144.C92
C. C143.C93+C144.C92
D. C93+C144

Từ các chữ số 1, 2, 3 có thể lập được bao nhiêu số tự nhiên có hai chữ số khác nhau?
A. 4
B. 8
C. 12
D. 6

Choose the best answer for the following sentence:
To become a novelist, you need to be _______________.  
A. imagine                    
B. imagination                      
C. imaginative                   
D. imaginarily

Choose the best answer for the following sentence:
If an insurance company refused to pay a claim, and the policy-holder prevailed in a lawsuit, then the insurance company would be ordered to pay what it owed (perhaps plus interest), and nothing more, even if the failure to pay caused additional _____________ to the policyholder.
A. damage             
B. suffering                 
C.  impairment                  
D. corruption

Choose the best answer for the following sentence:
“How ______________ we are to hear that you got the scholarship!” “Thank you. It was really a surprise.” 
A. pleasing              
B. pleased            
C. pleasingly                    
D. please

Choose the best answer for the following sentence:
Some signs _____________ that the house had once been a famous meeting place for people who liked playing card games.
A. could still be found
B. could be still found
C. could be found still
D. still could be found

Choose the best answer for the following sentence:
We were surprised at _______________________ going on a trip alone. 
A. her            
B. she                  
C. hers                
D. A or C

Choose the best answer for the following sentence:
They sell all kinds of rubbish now, but ________.
A. they once sold good handmade furniture
B. they have once sold good handmade furniture
C. they were once selling good handmade furniture
D. they would once be selling good handmade furniture

Choose the best answer for the following sentence:
Sea Shepherd and other anti-whaling protesters have continually harassed the Japanese whaling fleet in an effort to ______________ with Tokyo's hunting season, during which it takes hundreds of minke whales in the Antarctic.
A. participate                      
B. interfere                   
C. intrude                             
D. invade

Choose the best answer for the following sentence:
A penalty shot is _______________ when a major foul is committed inside the 5-meter line.
 
A. prevented                  
B. awarded                  
C. committed                 
D. ranged