1.I....you should go to the doctor a.am thinking b.think c.have been thinking 2.He....his ankle while he....tennis a.sprained, was playing b.sprained, played c.was spraining, was playing 3.I....just....about your accident a .was hearing b .have heard c.didn't heard 5.I....three tablets today a.am taking b.have been taking c.have taken 5.My father....patients since he left University a.has been treating b.was treating c .treated 6. I am wet, because I....... a.am swimming b.have been swimming c.swam