Trong mặt phẳng với hệ tọa độ Oxy, cho hai đường thẳng a và b có phương trình lần lượt là 2x + y + 5 = 0 và x - 2y - 3 = 0. Nếu có phép quay biến đường thẳng này thành đường thẳng kia thì một số đo của góc quay φ là:
A. 450
B. 600
C. 900
D. 1200

Choose the best answer for the following sentence:
Mrs. Kerry didn't want ____________________ on. 
A. to be operated                   
B. being operated 
C. to operate                   
D. to be operating

Choose the best answer for the following sentence:
 The minister faced a tough grilling at today's press __________. 
A. dialogue                
B. conversation                  
C. argument                   
D. conference

Choose the best answer for the following sentence:
The weather report says that ____________ ten inches of snow tomorrow.
A. maybe there are               
B. maybe will have
C. there may be    
D. we maybe have

Choose the best answer for the following sentence:
If Jack ____________ home earlier last night, he ____________ you back. 
A. had come - would have called                  
B. came - would call
C. had come - would call                    
D. came - would have called

Choose the best answer for the following sentence:
There are wide variations in the ways that poor people _______________ from volunteer work.
 
A. develop                   
B.  agree                  
C. conduct                  
D. benefit

Choose the best answer for the following sentence:
A defensive player may only hold, block or pull a / an ___________ who is touching or holding the ball. 
A. audience                     
B. referee                    
C. goalie                   
D. opponent

Choose the best answer for the following sentence:
Different people like specific types of books, and some people just like __________ literature in general. 
A. a  
B. an             
C. the 
D. Ø

Choose the best answer for the following sentence:
“What a beautiful dress you’re wearing!” “Thank you. It ___________ especially for me by a French tailor.”  
A. is made 
B. has made  
C. made  
D. was made

Choose the best answer for the following sentence:
She can't stand __________________ under such terrible conditions. 
A. working             
B. to work              
C. to be working                 
D. work