I have been seeking what I want all these years, but ______ I  have achieved nothing.

A. until then  
B. up to now
C. from now on  
D. right now
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科目：高中英語 來源：同步題 題型：單選題

I have been seeking what I want all these years,but________I have achieved nothing.
[     ]
A. until then  
B. up to now
C. from now on  
D. right now

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