Having taken aspirins,I found my headache seemed ______ a lot.


  1. A.
    went out
  2. B.
    to have been relieved
  3. C.
    to disappear
  4. D.
    to be away
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科目：高中英語 來源：同步題 題型：單選題

Only __________according to the directions can the medicine be quite effective.    
[     ]
A. taking                        
B. taken    
C. being tak'en                  
D. having been taken

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