[填空题]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. ______