Present Perfect Simple or Present Perfect Continuous? Circle the correct answer

Present Perfect Simple or Present Perfect Continuous? Circle the correct answer a or b. a Ive started driving lessons. b Ive been starting driving lessons. a Ive sold my bike to Paul. b Ive been selling my bike to Paul. a Peter has just swum. b Peter has just been swimming. a David has cried. b David has been crying. a Tim Henmann hasnt won the Wimledon. b Tim Henmann hasnt been winning the Wimbledon. a Have you stopped eating? b Have you been stopping eating?