68.B to

　　69.B simply

　　70.A vital

　　71.C too

　　72.A benefits

　　73.D outside

　　74.C Exposure

　　75.B less

　　76.C analysis

　　77.C necessarily

　　78.C approved

　　79.B always

　　80.A advantage

　　81.D grateful

　　翻译部分：

　　82. Their only son has never thought

　　83. weigh your decision against its possible consequences.

　　84. would he break his commitment to pay back the money.

　　85. should not be addicted to computer games.

　　86. never considered working as a salesman.