Paul (1) … (have) an interesting experience when he was a student. He (2) … (be) at Bristol University for nine
months and he (3) … (begin) to worry about money. He (4) … (know) that, if he wanted to continue his studies, he (5) … (have to) earn some extra cash. “If I (6) … (be) you,” his friend said, “I (7) … (do) some nude modelling for the art school. It’s easy work and the models (8) … (pay) quite well.” “That’s a good idea,” said Paul. “I think I (9) … (do) that.” On (10) … (arrive) at the art school for his first session, Paul (11) … (show) to the dressing-room where he (12) … (take off) all his clothes and (13) … (put on) a robe. Then he entered the studio where about twenty art students (14) … (sit) in front of an empty chair. He walked up to it, took off his robe and sat down. Some of the students started (15) … (giggle) and Paul (16) … (cannot / understand) why. He (17) … (sit) there for three minutes when a professor ran into the room. “You (18) … (make) a mistake,” he said. “You are in the wrong room!” He (19) … (enter) the class where the students were supposed (20) … (paint) an empty chair!