Trong mặt phẳng với hệ tọa độ Oxy, cho 4 điểm A(-2 ; 1), B(0 ; 3), C(1 ; -3), D(2 ; 4). Nếu có phép đồng dạng biến đoạn thẳng AB thành đoạn thẳng CD thì tỉ số k của phép đồng dạng đó bằng:
A. 2
B.
C.
D.

Choose the best answer for the following sentence:
I think John is ___________ in love with a Japanese girl.
A. dropping
B. falling
C. drinking
D.  tasting

Choose the best answer for the following sentence:
I don’t like horror films. I think they are ____________ and ____________. 
A. frightening - boring                   
B. frightening - bored
C. frightened - boring                 
D. frightened - bored

Choose the best answer for the following sentence:
It never occurred ___________ me to ask him ____________ proof ____________ his identity. 
A. for - for - of                 
B. to - for - of
C. to - for - for                
D. for - for - for

Choose the best answer for the following sentence:
They brefer driving _________ walking.
A. than
B. with  
C. to  
D. from

Choose the best answer for the following sentence:
Family is a good ___________ from which you can join the society with confidence. 
A. base               
B. basic                
C. basis               
D. basing

Choose the best answer for the following sentence:
''What did you do last night?'' ''I watched TV, practiced the piano, and _________________ my homework.'' 
A. made              
B. do                 
C. done           
D.  did

Choose the best answer for the following sentence:
This note is only a reminder. It's _________________________. 
A. nothing                 
B. no one                 
C. nothing extra                  
D. nothing more

Choose the best answer for the following sentence:
Happiness finally came to the patient couple after many _______________ years.
A. disturbed  
B. disrupted   
C. breaking    
D. intervening

Choose the best answer for the following sentence:
They picked up all the fruit _____________ had ripened.
A. who 
B. that 
C. where
D. whose