1. Travelling by train is still one of the safest …………….of transport. 
A. method                          
B. figure                    
C. resource                
D. research 
2. She has………………told her mother all about what has happened.
A. probable                          
B. probability           
C. improbable           
D. probably
3. The company is …………the number of workers.
A. decrease                           
B. decreased              
C. decreasing            
D. decreases
4. North America was mainly………..by new settlers from abroad.
A. population                       
B. populating            
C. populous              
D. populated
5. It is said that we must limit population growth because of our …………… resources.
A. limit                                 
B. limitation            
C. limited                   
D. limiting
6. Scientists give different answers………the question if the Earth has enough resources to support all the people.    
A. to                                     
B. for                          
C. at                            
D. with
7.We ……………….our money sooner if we’d received more positive advice.
A. have been investing        
B. didn’t invest         
C. have invested       
D. would have invested
8. If she had spoken like that at the presentation, everyone _................
A. will have been very impressed                          
B. would have been very impressed
C. had been very impressed                                    
D. was very impressed
9. If I have (A) known you were (B) sick, I would (C) have made you (D) some soup.
10. Carol kindly (A) asked me if was there (B) anything she could pick up (C) for me at the market. (D)
11.  If we arrived(A)  a few (B) minutes earlier,(C) we could have (D) caught the train.
Cảm ơn ạ