28- Doctor : Hello Hassan. …..(1) ……………………. is the matter?
Hassan : I …(2)……………………………… my back.
Doctor : When did you do this?
Hassan : It started after I …(3)………………….. some weights.
Doctor : Did you …(4)….your knees and lift the weight carefully?
Hassan : Yes, 1 always do that when I lift weights.
Doctor : Remember that it is important to stretch before you do exercises.