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If I ___ only get out of this bed for a while, then I ___ get fresh air-or just lean out the window-and see the street.
A) should / would
B) was able to / would
C) had to / would be able to
D) could / can
E) was able to / could
Hi friends. I couldn't figure out this question. What are your opinions, especilly about choice D?
If only and can 
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