a don't know about page 43 but for page 44 activity 18;
#1 me diverti (little accent on the last I)
#2 se canso
#3 se enfermo (little accent on the o)
#4 se quejaron
#5 nos cansamos
activity 19 (I am oly answering the first part)
#1 nos divertimos
#2 me enfermo(accent again)
#3 se cansa
#4 se quejan