1. Many things ___ impossible in the past are common now.
　　A. considered         
　　B. considering       
　　C. to consider       
　　D. to be considered
　　2. The factory is said ___ in a fire two years ago.
　　A. to be destroyed                                      
　　B. to destroy
　　C. to have destroyed                                   
　　D. to have been destroyed
　　3. The reason for his success is ____ he worked hard.
　　A. why                  
　　B. that                         
　　C. because            
　　D. for
　　4. By the time the course ends, ___ a lot about Britain.
　　A. we’ll learn  
　　B. we are learning 
　　C. we have learnt  
　　D. we’ll have learnt
　　5. I did not know ___ him or not.
　　A. whether to help   B. if to help                 
　　C. how to help             
　　D. what to help
　　答案：ADBDA

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