每天一练：2008年大学英语六级试题：第二十七期

82 But for mobile phones,our communication would not have been so efficient and convenient/ (我们的通信就不可能如此迅速和方便).
　　83 In handling an embarrassing situation,nothing is more helpful than humor/ a sense of humor(没有什么比幽默更有帮助的了).
　　84 The Foreign Minister said he was resigning,but (he) refused to make further explanation/ to further explain why(他拒绝进一步解释这样做的原因).
　　85 Human behavior is mostly a product of learning,while animal behavior depends mainly upon (或on) their instinct(s)(而动物的行为主要依靠本能).　
　　86 The witness was told that under no circumstances should he lie to the court / is he allowed to lie to thecourt(他都不应该对法庭说谎).