Heather is one of the biology student at the 76.______ university. He is very busy and doesn’t have many free 77.______ time these days. Heather attend several classes and lectures 78.______ four days in a week; he has none on Tuesday. But he 79.______ spends a few hours in lab every Wednesday. He 80.______ has to do a few of experiments every day. Heather never 81.______ has enough time to finish everything. There is too much 82.______ pressure on him to complete all her course requirements. Still 83.______ he doesn’t have any regrets about choosing biology for 84.______ his future career. There is no other field that interests in him. 85.______