Heather is one of the biology student at the 78.______ university. He is very busy and doesn’t have many free 79.______ time these days. Heather attend several classes and lectures 80.______ four days in a week; he has none on Tuesday. But he 81.______ spends a few hours in lab every Wednesday. He 82.______ has to do a few of experiments every day. Heather never 83.______ has enough time to finish everything. There is too much 84.______ pressure on him to complete all her course requirements. Still 85.______ he doesn’t have any regrets about choosing biology for 86.______ his future career. There is no other field that interests in him. 87.______