A. at times                    
B. at other times      
C. at the same time              
D. at a time

A. In my spare time                  
B. On my spare time          
C. At my free time                 
D. For my free time   

A.  after all    
B.  at all    
C.  first of all    
D.  above all

A. out of, to buy
B. out, to buy
C. out of, buying
D. out, buying

1. In the past, married women were too busy at home to continue working.   
In the past, married women were ________ busy at home ________ they couldn’t continue working.
2. Beijing, the capital of China, has a history of more than 3,000 years.
Beijing, the capital of China, has a history of ________ 3,000 years.
3. They have been married for ten years.  
They ________ ________ ten years ago.
4. The teacher  is young, but he is very experienced.  
________ the teacher is young, he is very experienced.
5. Transport is much better today, but as an opposite point, faster transport makes more pollution.
Transport is much better today, but ________ ________ ________ ________, faster transport makes more pollution.

A.  At the end of
B.  In the end    
C.  By the end    
D.  At the end

A. on; and
B. from; to
C. between; on
D. during; to

A.  face to face
B.  little by little
C. step by step
D. side by side

A. on the future    
B. in the future    
C. at the future  
D. in a future

A. on wall
B. in the wall
C. on the wall
D. at wall